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OFO Bike Sharing Market Research

3 Dec

Image result for OFO

My students in microeconomics were recently studying quantity demand and ways to improve profits. Before we moved onto changing prices, we spent some time discussing ways they can change or alter the other 5 factors of demand (Income, Price of Related Goods, Taste, Future Price, and Number of Buyers in the Market).

This brought us to Consumer Research and how companies gather information about their buyers, products, and demand markets.

I recently noticed that the OFO bicycle system has just started operating on the Northeast Normal University campus this semester. For those of you unfamiliar with the system, OFO is an app that allows users to rent bicycles and drive them around town with no designated pick-up or drop-off site.

It was originally founded in Beijing in 2014, but has since spread to cities around China and more countries besides.

The theory of the system is rather simple.

Users download the application on their cell phones and set up an account. The start-up deposit fee has traditionally been 199RMB in China (about $30) which then goes to your account. Then it costs a small amount (1-2RMB) per hour (about $0.16) that you ride. To get a bicycle you locate the familiar yellow bike and use the Code Scanner on your phone to read the bicycle’s bar code. That registers the bicycle to you, and you then ride around wherever you want to go. When you are finished, you cancel the agreement and leave the bicycle wherever you stopped.

There are many conveniences to the program (handy for local transportation, students enjoy the system). But there are some inconveniences as well (too many bicycles left lying in the way of sidewalks and doors, bicycles can be difficult to find, etc).

So I arranged a small market survey and sent it out to my students. They shared it with the freshman (and a few with their parents / siblings) and we used KwikSurveys.com to analyze our results.

Although it is not official, it was a lot of fun and we did learn some interesting results that I thought I would share.

Income

We started by testing the income level of our respondents. We agreed that 199RMB was a lot for students with less than 1000RMB per month. There were a few students who thought it was too expensive as a start-up deposit. Especially since most of them felt they may not ever use that much money in the long run. Some of the students complained that since Changchun is in the north (with very cold weather very early in the fall and late in the sprint), their time to use it was limited. This much money for something they would only use a few months was a stretch.

Demographics

To get a feel for our response bias and the real category of people we reached, we also established some demographics.  

Most of the boys agreed they had tried it, but we had a difficult time getting them to take the survey. 🙂

The students also agreed that, although our survey never reached them, their parents and grandparents were a possible market for OFO. Several students said their parents had already tried it as well. The 21 – 25 year olds were mostly our Junior students. The 15-18 year olds were Freshmen.

Reputation of OFO

At this point, most of the students were familiar with the system. Those who did not recognize the same were aware of the “Yellow Bicycle”

PAST PERFORMANCE

The students also agreed that 24% was a high number for a company like OFO. Although it has only been in Changchun this year, it has been operating in China for a while. They recommended that OFO help teach people how to ride bicycles or show people how to set up the account. They felt like there was not enough information about OFO or people introducing them to OFO.

Some students (and me) had trouble setting up the OFO account. Most of the unhappy users felt like the system was clear, but it often didn’t work or was broken. They complained that they would try to put in all the information and then would get an error code. But quite a few thought it went pretty smoothly.

The Bicycle “easy to reserve” part was must less satisfying amongst the students. The majority complained that there weren’t enough bicycles. They paid a high start-up deposit fee, but then could not ever find bicycles in their area. The bicycles were far away or were already being used. They wanted OFO to provide more bicycles in the area. At the same time, we discussed Beijing and Shanghai’s problems where there are TOO many bicycles available. The bicycles are parked on the sidewalks, and with so many taking up the space, people are forced to walk in the busy streets.

Most agreed that they enjoyed the experience overall. Some felt that it was too cold when they tried it (October — people in the far north are already bundling up for winter and heaters are turning on). Perhaps after summer they will have a different impression. Others felt like it was a lot of money and aggravation to get it all going. Many felt like it was a lot of fun for entertainment, but would not replace taxi or DiDi services.

FUTURE INTEREST

Overall, students seemed to feel that the program had a lot of potential and possibility. They did however think there were areas where it could be improved. It was a fascinating discussion, and the students responded very well!

Abbreviations are CRAZY

28 Nov
Me: “If I give you Q, TVC, and TFC you can find TC, AVC, AFC, SMC, ATC, etc.”
 
Students: 😓😵
 
Me: 🤣 Let’s try it step by step. . .

Snickerdoodle #Treats!

31 Oct

Making yummy #Snickerdoodles for the 8 #proctors of my #exam today 😊  320 students, 4 classrooms, one exam.  Go #microeconomics students!!!  Fighting!!  Jiayou!

#Business and #Economics ~ Consumer Surplus Explained

30 Oct

As always, this lesson is not intended to be professional advice. This is simply lesson material for ESL students in an introductory Economics and Finance class. Posted here for their use or for helping other students. 

This is not intended to be an advanced, in-depth economic analysis of consumer surplus. However, in teaching the concept to my students, I discovered that most websites and teaching materials did not explain the material very well.  They all wanted to start with Consumer Surplus is X – Y .  . . and oh, by the way, it’s also the area of a triangle! 😀 

Which sucks, because it does not explain why it is the area of the triangle.  

So for all the beginning 101 ESL students, I hope this helps explain it!

Part #1 ~ Vocabulary

  • Buyer (n.) ~ A person who exchanges their money in return for a product. Someone who purchases the product. 买方 – Mǎifāng
  • Competition (n.) ~ A situation where two or more people are struggling to claim the same resource.  In economics and business, sellers of substitutes are competing for the same buyers. 竞争 – Jìngzhēng
  • Consumer Surplus (n.) ~ The difference between the price the buyer would have paid for a product and the price the buyer did pay for the product.   消费者过剩 – Xiāofèi zhě guòshèng
  • Demand Curve (n.) ~ A line showing the relationship between the number of products people want to buy and the price. The demand curve shows how many products are demanded at each price. 需求曲线 – Xūqiú qūxiàn
  • Discount (n.) ~ How much the seller has decreased the price from its original amount. Tommy changed the price of his bicycles from $400 to $300. This is a 25% discount. 折扣 – Zhékòu
  • Discount (v.) ~ To lower the price. When the seller lowers the price of a product in order to increase demand, they discount the price. 贱卖 – jiàn mài
  • Economic Value (n.) ~ The maximum price that a buyer would have paid for a product. The demand curve shows the economic value for each quantity. 经济价值 – Jīngjì jiàzhí
  • Law of Demand (n.) ~ The rule in economics that says when the price of a product goes up, the quantity demanded will go down. When the price of a product goes down, the quantity demanded will go up.  需求法则 -Xūqiú fǎzé
  • Market Demand (n.) ~ The total number of products that all buyers require.  Usually shown on a Market Demand Curve demonstrating the relationship between the total quantity demanded and the price.  市场需求- Shìchǎng xūqiú
  • Market Price (n.) ~ The price of a product when it is sold / The price a buyer pays for a product and a seller gets for a product. 市场价格 – Shìchǎng jiàgé
  • Perfect Competition Market (n) ~ A market or industry where there are many buyers and many sellers. All are competing with each other for the best price in a market where there are many substitutes and the products are pretty similar. Companies in these markets have low market power and are usually price-taking. 完美的竞争 – Wánměi de jìngzhēng
  • Seller (n.) ~ Someone who offers a product in exchange for money. The person or company presenting a produce on the market for purchase.  卖家 – Màijiā
  • Total Consumer Surplus (n.) ~ Draw a triangle using the Demand Curve and the Market Price.  Total Consumer Surplus is the area of that triangle.  It is the total savings of all the buyers on the market. See Consumer Surplus.    消费者剩余总额 – Xiāofèi zhě shèngyú zǒng’é

Part #2 ~ What is Consumer Surplus?

The perfect competition 完美的竞争market is a beautiful creature full of amazing trends 趋势and patterns!  In a perfect competition market, buyers and sellers can sometimes trade a product at a better price than they expected (预期). 

Example #1: Timmy is interested in buying a soda (Coca Cola).  Because Timmy is really thirsty, he takes 3¥ and goes to the store to look for a soda.  Although Timmy is willing to pay 3¥ for the soda, he is very happy! He finds a discount 贱卖 where sodas are only 2.80¥ at Walmart.   This means Timmy saved 0.20¥ for his drink! 😊

We call that 0.20¥ a Consumer Surplus (消费者过剩)!  If a buyer pays a price lower than the maximum he was willing to pay, he has a consumer surplus.  By definition: Consumer Surplus is the difference between what the buyer would have paid and what the buyer did pay.

Example #2:  Tara wants to buy a bicycle. She goes to the store and sees that a bicycle is 400¥.  That seems like a good price. She goes home and works and works and works and works. One month later, she has 400¥. She goes to the store again, but now the bicycle is on sale! Discount! The new price is 350¥! 😊 Yay!  She has a Consumer Surplus of 50¥!

Notice: Both the buyer and the seller think the Consumer Surplus is important. For the buyer, the more money they save, the happier they are. The more they save, the more they are willing to buy.  Remember, this market has competition竞争 because there are many buyers and many sellers.  So, if Company A offers the buyer a bigger consumer surplus than Company B—the buyer will shop at Company A.  This is good for the buyer, but bad for Company B.  So Company B will be watching—if Company A has a sale and gives the buyer big savings, Company B will also probably offer a sale in the future also.  We see this all the time—the same product is on sale at 5 different stores. 

Part #3 ~ How to Find Consumer Surplus for One Product?

Consumer Surplus = Economic Value – Market Price

Oh dear. . . . new words.

Let’s start at the beginning.  Economic Value (. 经济价值) is the maximum price the buyer would have paid.  For Timmy, that price for one soda was 3¥.  For Tara, that price for one bicycle was 400¥. 

But in economics 经济学, where do we find this number?  How can you know what the maximum price is that a buyer would have paid?  How do you know how much the buyer was willing to give to the seller?

THE DEMAND CURVE!

The demand curve 需求曲线 is a line that tells us how many products a buyer is willing to buy at a certain price.  It is the price per product

Example: In the picture below:

dEMAND.jpg

If the price is $3.00, Timmy will buy one soda (that is the maximum price Timmy is willing to pay for Soda #1).  Economic Value for Soda #1 = $3.00

If the price is $2.50, Timmy will buy two sodas (that is the maximum price Timmy is willing to pay for Soda #2). Economic Value for Soda #2 = $2.50

If the price is $1.00, Timmy will buy 5 sodas (that is the maximum price Timmy is willing to pay for Soda #5).  Economic Value for Soda #5 = $1.00

This line shows us an important economic 经济学 rule called the Law of Demand.  This rule says that if the Quantity Demanded is going up, then the price must go down. Each extra soda that Timmy buys is worth a little bit less to him. ☹

So, what is Market Price  (价格)? Market Price is the actual price for the product that the buyer paid.  For Timmy, this price was 2.80¥ for one soda. For Tara, the Market Price was 350¥.  

Demand 2

In the graph above:

            Economic Value for Soda #1 = $3.00

            Market Price for Soda #1 = $1.00

            Consumer Surplus for Soda #1 = $3.00 – $1.00 = $2.00

           

            Economic Value for Soda #2 = $2.50

            Market Price for Soda #2 = $1.00

            Consumer Surplus for Soda #2 = $2.50 – $1.00 = $1.50

Notice! Important! It is true that if Timmy buys more soda, will save a larger total amount of money.  If he buys only one soda, he just saved $2.00. But if he bought 2 sodas, he would have saved ($2.00 +$1.50 = $3.50). This is why your parents always buy more if something is on sale at the store.  But the savings for each extra soda goes down, down, down. He saves a little bit less for each extra soda he buys.

Here’s the problem — most companies do not just have one buyer (Timmy).  Most companies sell thousands of products to thousands of buyers. Some sell millions of products a day!  

 This is why we don’t always use Economic Value – Market Price. If you only had two products, that might be pretty easy.  But if you have 500,000 products it gets harder and harder to do EV – MP for every single one.

So we have something special called Total Consumer Surplus (消费者剩余总额).  The total consumer surplus is the TOTAL savings for all the buyers. 

To find Total Consumer Surplus, we need to start with a new line called the Market Demand Curve (市场需求). 

Let’s say that we have 3 airplane companies: United Airlines, China Eastern Airlines, and Korean Air. They all want to buy Soda for their airplanes.

  United Airlines China Eastern Korean Air
$0.00 500 550 425
$0.50 400 450 325
$1.00 300 350 225
$1.50 200 250 125
$2.00 100 150 25
$2.50 0 50 0
$3.00 0 0 0

Now we could try to write three demand curves and do a lot of math. 

But much easier is making a new demand curve based on the total number of products all three companies are willing to buy.

$0.00 1475
$0.50 1175
$1.00 875
$1.50 575
$2.00 275
$2.50 50
$3.00 0

The Market Demand Curve would look like this:

Market Demand 1

Now, we have a “Demand Curve” to work with for Total Consumer Surplus. So let’s start!

Step 1: Market Price.

I say that Market Price was $1.00!  Draw a line showing how many products were purchased at one dollar on our graph.  

Market Demand 2

From the purple line, we know that when the price was $1.00 the demand for sodas was 875 bottles for all three companies.

Step 2: Let’s cover up everything after 875 bottles with Yellow Marker . . . . nobody bought those so we won’t count bottles 876 through 1475.  For Consumer Surplus, you can forget about those bottles.

Market Demand 3

Step 3: Now, the Market Price was $1.00 per bottle.  This means they paid $875 to the company.  Let’s fill in everything below the purple line with Purple Marker to show how much money the buyers lost.

Demand.png

Step 4:    Okay. . . . now we can do Consumer Surplus the very, very, very long way.  This means drawing a line from the Economic Value to to the Market Price for every single one of the 875 bottles of soda that we sold.

Market Demand 4

Soda #1 = Economic Value1 – Market Price1
Soda #2 = Economic Value1 – Market Price1
Soda #3 = Economic Value1 – Market Price1
Soda #4 = Economic Value1 – Market Price1
Soda #5 = Economic Value1 – Market Price1

Notice how we just keep coloring in that triangle more and more? If we did all 875 lines, the entire triangle would be colored!

Market Demand 5.jpg

This is why, when we do Total Consumer Surplus, we say you should find the AREA OF A TRIANGLE (一个三角形的区域) instead of adding together all the Economic Value – Market Price that you would have to do.

Demand 33

 The total amount of money that the airlines saved was about $875.   So Total Consumer Surplus for the market was $875!

#Business and #Economics ~ What is Short Selling

25 Oct

As always, this lesson is not intended to be professional advice. This is simply lesson material for ESL students in an introductory Economics and Finance class. Posted here for their use or for helping other students. 

Part #1 ~ Vocabulary

  • Short Sell (v.) ~ X borrows stock from a stock broker, sells the stock, buys it back, and then returns the stock to the stock broker. 卖空 – Mài kōng
  • Stockbroker (n.) ~ Someone who buys and sells stocks (a middleman – 中间人). 证券经纪人 – Zhèngquàn jīngjì rén
  • Shares (n.) When part of a company’s ownership is divided into equal portions, each portion is called a share. Each share gives the owner part of the ownership, profits, and a vote. A piece of the Stock.  – Gǔ
  • Loan (n.) ~ Money that A borrows from B and must eventually pay back. Often includes an extra “interest”息 fee.  – Dài
  • Stock price (n.) ~ The cost of purchasing one share (股of a company. 股价 – Gǔjià
  • Stock Market (n.) ~ A place (either a physical market or an online market) where buyers and sellers trade in company shares. 股市 – gǔ shì

Part #2 ~ What is Short Selling

Short selling is where:

  1. Step 1: You borrow 借 some shares 股份 of Company A from your broker (证券经纪人). Notice that you did NOT buy, so it is similar to a loan. You must pay the broker back the money for the stock later. 
  2. Step 2: You sell the stock to someone else. 
  3. Step 3: You buy the stock back again and give it back to the broker. 

Part #3 ~ Why or Why Not Short Sell?

If you short sell correctly and are successful, you can make a lot of money doing this. 

But if you want to make money, then the stock price 股价 must go down between Step 2 and Step 3. 

If the stock price 股价 goes up between Step 2 and Step 3, you will lose money.

If you buy long, you just use your own money to buy the stock. 

Part #4 ~ Examples 

Marilyn’s Flowers (ABCD) is selling their shares at $25 for one share. 

Michael believes that the price of ABCD’s shares is inflated (充气) and is too high right now. The shares are not worth that much money. He also believes the price is going todecrease in the future (usually very soon). 

Samuel believes that the price of ABCD’s shares is not going to decrease in the future. Instead, he believes that the price will increase.

EXAMPLE #1 (Buying Long)

Samuel goes to the Stock Market (股市) and uses his own money to buy one share for $25.

Situation A: Michael is right. Two days later, the stock price goes down to $10. 

  • Samuel’s Revenue: $10
  • Samuel’s Cost: $25
  • Samuel’s Profit: (-$15) Samuel lost his money.

*Notice that in this situation, the maximum amount of money Samuel can lost is $25. Even if the stock price 股价 falls to $0, Samuel will only lose $25. 

Situation B: Samuel is right. Two days later, the stock price goes up to $45.

  • Samuel’s Revenue: $45
  • Samuel’s Cost: $25
  • Samuel’s Profit $20

*Notice that in this situation, Samuel’s profit could go very high as long as the price keeps going up. It is better for Samuel if the price goes up and bad if the price goes down. But his only risk is $25.

EXAMPLE #2 (Short Selling)

Instead of using his own money, Michael goes to Thomas & Sons (his stockbroker) and borrows a share from them. He goes to the Stock Market (股市) and sells that share for $25. 

Situation A: Michael is right. Two days later, the stock price goes down to $10. Michael buys one share for $10 and gives it to Thomas & Sons to pay them back for what he borrowed. 

  • Michael’s Cost: $10. 
  • Michael’s Revenue: $25
  • Michael’s Profit: $15

Situation B: Samuel is right. Two days later, the stock price goes up to $45. Michael has to buy one share at $45 to give to Thomas & Sons to pay them back for what he borrowed.

  • Michael’s Cost: $45
  • Michael’s Revenue: $25
  • Michael’s Profit: (-$20) ~ Michael actually lost $20. 

*Notice that in this situation, Michael could lose a lot of money (far more than the $25 he earned. If the price keeps going up, he would lose more and more. For example, if the price goes up to $100, Michael will lose $75. The risk for Michael is more than the risk for Samuel. 

Business Symbols & Abbreviations

18 Oct

Common Business, Economics, and Finance

Symbols & Abbreviations

 

 

Symbol & Abbreviation Meaning
Δ Change or Difference (ΔQ means the change in Quantity Demanded from time 1 to time 2
+ Plus, Rise, Goes Up, Increases, Add
Minus, Fall, Goes Down, Decreases, Subtract
QD Quantity Demanded (The number of products the consumers want and can purchase)
QS Quantity Supplied (The number of products the suppliers have available on the market)
P Profit
p price
± Plus or Minus. (QS = ±3 means that QS can either go up or down 3 depending on what you changed).
X < Y X is less than Y
X > Y X is more than Y | X is greater than Y
X the Vertical line on a graph
Y the Horizontal line on a graph

 

#Business and #Economics: Business Vocabulary with Chinese Translations (Update)

11 Oct

I’ve added new terms to the list of Business Vocabulary.

Don’t forget, the Chinese translations come from the Chinese students rather than professional translators. While I believe they are accurate, you may want to consult professionals before using them for official documents. This is mainly intended to contribute to daily conversation between English speaking Companies and Chinese companies.

Abbreviations:

v. = Verb
n. = Noun
adj. = Adjective
adv. = Adverb

(c) All Rights Reserved. You are welcome to use this material. However, if you do end up using these definitions in your material (educational, informational, or professional), please include either a link to this webpage or the following reference: Blessing, Olivia. “Business Vocabulary with Chinese Translations.” DeceptivelyBlonde.com. This is for two reasons: 1) I’d like to share the resource with others. 2) I created these definitions myself. Thanks!

Divider

Bar Chart (n.) A way of showing information on a chart 图表. The chart shows the information divided up into rectangles. Each rectangle represents one factor and shows the “amount” of that factor.  Allows readers to compare and contrast different things.    条形图 – Tiáo xíng tú

Image result for bar chart

Capital (n.) ~ Wealth (usually money, but also includes other assets) used to buy the inputs and materials used in order to create products. The term has different meanings depending on whether you are an accountant, economist, or financial adviser. 资本 – zī běn

Graph (n.) ~ A way of showing the relationship between two factors in a picture or image form.  Two lines, one called “X” and one called “Y,” are each used to represent one factor.  Lines can then be drawn to show the relationship between X and Y as they change.   曲线图 – qū xiàn tú

Image result for line graph

Input (n.) ~ Resources used to create a product . . . technology, labor, raw materials, etc. Only materials used to make the product, not those used to sell, ship, etc.  用于创建产品的资源

Labor (n.) ~ 1Effort. The work you put into something (“Thomas wants a higher salary for his labor“). 劳动 – Láodòng 劳动是人类生产力为改变商品的使用价值和增加商品的价值的实际使用 2(In Economics & Finance) The number of employees (“When Capital is $15, the Labor is 4 employees“). Usually abbreviated 简短的 “L” in mathematical formulas and economic models. 劳动力 – Láodònglì

Labor (v.) ~ To work. To put effort into something.  劳动 – Láodòng

Loan (n.) ~ Money that A borrows from B and must eventually pay back. Often includes an extra “interest”息 fee.   – Dài

Marginal (adj.) ~ In Business & Economics – A factor of or something that results from small or little changes. Often the profit, cost, or revenue associated with having or making “one more” of something. 边际 – biān jì

Marginal Cost (n.) ~ The cost that comes when you make one more product. 边际成本 – biān jì chéng běn

Marginal Profit (n.) ~ The profit (revenue – cost) that comes when you make one more product. 边际利润 – Biān jì lì rùn

Marginal Revenue (n.) ~ The revenue that comes when you make one more product. 边际报酬 – biān jì bào chóu

Negative Correlation (n.) The situation when two things (X & Y) are related to one another so that if X increases, Y decreases. If X decreases, Y increases. (X & Y go in opposite directions). In economics, we often say two things are “inversely related” if there is a negative correlation. For example, if Price goes up then Quantity Demanded will go down. There is a negative correlation and they are inversely related 负相关– Fù xiāngguān

Output (n.) ~ The number of products created. 产量 – Chǎnliàng

Pie Chart (n.) ~ A way of showing information on a chart 图表. The chart is a circle divided into pieces, each representing a percent (%) of the whole “pie. 饼形图 – Bǐng xíng tú

Image result for pie chart

Positive Correlation (n.) ~ The situation when two things (X & Y) are related to one another so that if X increases, Y also increases. If X decreases, Y also decreases. 正相关 – Zhèng xiāngguān

Quantity (n.) ~ The specific amount of something. Answers the question: “How Much.” 空头 – Kōng tóu.

Rate (n.) ~ 1. The speed at which something happens. For example the “Turnover Rate” 周转率 can tell us how often employees leave a company and new ones have to be hired. 率 – lǜ  2. The percentage of X compared to Y. For example, the “Tax Rate” is how much of the Revenue (Y) is used for Taxes (X). 比率 – bǐ lǜ

Scatter Plot (n.) A way of showing information on a chart or graph. A “Scatter Plot” is a graph where the information does not make a straight line 直线. Instead it is “scattered” (疏散) around the graph. 散点图 – Sàn diǎn tú

Image result for scatter plot

Short Sell (v.) ~ X borrows stock from a stock broker, sells the stock, buys it back, and then returns the stock to the stock broker. 卖空 – Mài kōng

Stockbroker (n.) ~ Someone who buys and sells stocks (a middleman – 中间人).  证券经纪人 – Zhèngquàn jīngjì rén

Stock Market (n.) ~ A place (either a physical market or an online market) where buyers and sellers trade in company shares.  股市 – Gǔ shì

Stock Price (n.) ~ The cost of purchasing one share (股of a company. 股价 – Gǔjià

Substitution (v.) ~ Using one thing instead of another. Replacing X with Y. 取代 – Qǔdài

Managerial #Economics ~ Understanding #MRTS the Fun Way!

12 Jun

As always, this lesson is not intended to be professional advice. This is simply lesson material for ESL students in a Managerial Economics and Finance class. Posted here for their use or for helping other students.

PART 1 – Key Words

  1. Quantity (量) ~ How many products = Q (# of  🚗)
  2. Labor (员工) ~ The Number of Workers = L (👱)
  3. Capital (资金) ~ The Money ($$) we need = K (💲)
  4. Change (变化) ~ How much did the # change? = Δ(🔺)
  5. Marginal (边际成本) ~ Result if you add ONE MORE (+1) Q
  6. Rate (比率) ~ Ratio
  7. Substitution (取代) ~ XK = 1L (Substitution asks “what is X?”)
  8. Input (输入) ~ All the resources you put into a product. 
    1. Ice Cream 🍦has many inputs:
      1. Milk🥛
      2. Eggs🍳
      3. Sugar
      4. Ice
      5. Salt
      6. Chocolate Sauce
  9. Output (产量) ~ The product you create 
    1. Ice Cream 🍨🍦is the output!

Part 2 – The Relationship Between L, K, and Q

Every product (产量) can have lots of inputs (输入), just like the Ice Cream 🍦 or a Car 🚗.  

Input + Input + Input + Input = Output (🚗)

But in our class, we focus on TWO inputs: Labor (👱) and Money (💲)

👱+💲=🚗
Labor (👱) + Money (💲) = Quantity (🚗)
L (👱)+ K (💲)= Q(🚗)

Example: 
Justin sells 200 cars 🚗every day. Not 201 cars. Not 199 cars. He sells EXACTLY 200 cars 🚗every day. 

L (👱) + K (💲) = 200 cars (🚗)

Justin knows that in ONE DAY🔆:

  • 1 worker 👱 can create 50% of a car 🚗~ 2 workers 👱👱can create 100% of a car 🚗(one car)
    • 1L = 0.5Q 🚗
    • 2L = 1Q 🚗
  • $5 💲 can pay for 20% of a car 🚗~ $25 💲can pay for 100% of a car 🚗(one car)
    • 1K = 0.2Q 🚗
    • 5K = 1Q 🚗

Rule #1 ~ If Land K ⬆, then the # of 🚗 cars will also ⬆

Rule #2 ~ If Land K ⬇, then the # of 🚗 cars will also ⬇

Rule #3 ~ If L ⬇  and the # of 🚗 cars is still 200 (stay the same), K must ⬆

Rule #4 ~ If K ⬇  and the # of 🚗 cars is still 200 (stay the same), L must ⬆

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Today, Justin looks 🤔at his Money 💲and is NOT happy😭. He thinks he spends TOO MUCH money😡!  He wants to buy a new bicycle🚲, so he decides to SAVE $100 💲

This means today:

👱L + (💲K – 💲100K) = ? Q🚗

WHAT IS THE NEW Q (number of cars🚗) that Justin Makes Today?

Day 1 (Yesterday): 👱L + 💲K = 🚗200Q

Day 2 (Today): 👱L + (💲K – 💲100K) = 🚗200Q – all the 🚗cars $100K would pay for. 

Remember!  💲1K = 🚗0.20Q (one dollar pays for 0.20 cars in a day)

If Justin does not spend $100 today, he will lose the money for 20 cars! 

1K = 0.20 cars
💲-100K = -20 cars🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗

ANSWER: Justin makes 180 cars today!

L + (K – 100K) = 200 cars – 20 cars 
= 180 cars🚗

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OK?!?🤔

NO!!!  😡Remember –> “Justin sells 200 cars 🚗every day. Not 201 cars. Not 199 cars. He sells EXACTLY 200 cars every day. ”  

PROBLEM:  How can Justin still make and sell 200 cars tomorrow if he still saves the $100 (-100K) as today.

Rule #4 ~ If 💲K ⬇  and the # of 🚗 cars is 200 (the same), 👱L must ⬆

 

QUESTION: HOW MUCH should 👱L  go up (⬆)?  

  • Step 1 ~ How many extra cars 🚗does Justin need to make? ~ Justin can make 180 cars right now if he saves $100 (-100K) but L stays the same as yesterday.  

200 🚗 – 180 🚗= 20🚗
Justin needs to make
👱L ⬆ enough to make 20 extra cars🚗 tomorrow.

  • Step 2 ~ How much L does Justin have to add (+) to make 20 more cars tomorrow?

?L + (K – 100K) = 200Q

Remember,

👱1L = 0.5Q 🚗 | 👱👱2L = 1Q 🚗
20Q 🚗= 40L

ANSWER: Justin will have to hire 40 workers (+40L) in order to make 20 more cars tomorrow.

👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫👫

FINAL SOLUTION

*Substitution = Adding L to Decrease K

(👱L + 👱40L) + (💲K – 💲100K) = 200 Q (🚗)

Part 3 ~ MRTS

MRTS = Marginal Rate of Technical Substitution

 CodeCogsEqn.gif

Go Back to Part 2.

  • 🔺K💲
    • Yesterday, Justin had K💲
    • Tomorrow, Justin has -100K💲
    • 🔺K = -100K💲
  • 🔺L👱
    • Yesterday, Justin had L👱
    • Tomorrow, Justin has +40L👱
    • 🔺L = +40L👱

CodeCogsEqn.gif

CodeCogsEqn (2).gif

CodeCogsEqn (3).gif

MRTS = 5K : 2L |5💲 : 2👫

This just tells us:

  1. For every 2 👫workers Justin has, he spends $5💲💲💲💲💲.
  2. For every 1 👱worker Just has, he spends $2.50💲💲½
  3. If Justin wants to hire 1 worker (+1L) , he will save $2.50 (-2.50K)
  4. I Justin wants to save $40 (-40K), he must hire 16 workers (+16L)

MRTS shows how much L👱 can be a substitute for K💲!

#Emoji Economics

10 Jun

Lol – explaining MRTS and upper level economics theories to a student via emoji and wechat messenger. 😂 

The ways we adapt to the ESL academic class!

#Business in #China ~ #Contracts

4 Jun

One of the problems I repeatedly encounter in China is the fact that they view contracts as “guidelines rather than actual rules.” The American business system and legal system interprets a contract as law — If you agreed to it, you MUST do it. The Chinese professionals I have worked with interpret contracts as “this is what we think might work, but it’s always open to reinterpretation and change later.” One year I was actually told (after completing all of the required work) “Oh, well, what we said was really just too excessive so we’ve decided not to pay you that.”

This is a VERY big problem and a huge source of discord between the Chinese and foreign workers. Americans are expecting things by the book, but in China you need adaptability. On the other hand, the Chinese are promising more than they deliver and breaking promises. If you are considering working in an American-Chinese business or teaching atmosphere, I highly recommend you discuss this issue before signing contracts. Talk to the other side and verify how they view a contract — law or general guideline. Find a way to agree on what will be included and then keep the promises you do agree to.

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