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The decline in print news reading predates 2004. Print newspaper circulation peaked in 1973 and has declined since then due to competition from television and radio news. In 1991, 55% of Americans indicated they got their news from print sources, while only 29% did so in 2012. Radio news has followed a similar path in recent decades, with the share of Americans getting their news from radio declining from 54% in 1991 to 33% in 2012. Television news has held its own over the last 15 years, with a market share staying in the mid to upper fifties. What does this suggest for the future, given that two-thirds of Americans under 30 years old say they do not get their news from television at all?

The interconnections and speed of adjustment in real markets

In the real world, many factors that affect demand and supply can change all at once. For example, the demand for cars might increase because of rising incomes and population, and it might decrease because of rising gasoline prices (a complementary good). Likewise, the supply of cars might increase because of innovative new technologies that reduce the cost of car production, and it might decrease as a result of new government regulations requiring the installation of costly pollution-control technology.

Moreover, rising incomes and population or changes in gasoline prices will affect many markets, not just cars. How can an economist sort out all these interconnected events? The answer lies in the ceteris paribus    assumption. Look at how each economic event affects each market, one event at a time, holding all else constant. Then combine the analyses to see the net effect.

A combined example

The U.S. Postal Service is facing difficult challenges. Compensation for postal workers tends to increase most years due to cost-of-living increases. At the same time, more and more people are using email, text, and other digital message forms such as Facebook and Twitter to communicate with friends and others. What does this suggest about the continued viability of the Postal Service? [link] and the text below illustrates using the four-step analysis to answer this question.

Higher compensation for postal workers: a four-step analysis

This image has two panels. The one on the left shows the four step analysis of higher compensation for postal workers. The one on the right shows the four-step analysis of a change in tastes away from Postal Services.
(a) Higher labor compensation causes a leftward shift in the supply curve, a decrease in the equilibrium quantity, and an increase in the equilibrium price. (b) A change in tastes away from Postal Services causes a leftward shift in the demand curve, a decrease in the equilibrium quantity, and a decrease in the equilibrium price.

Since this problem involves two disturbances, we need two four-step analyses, the first to analyze the effects of higher compensation for postal workers, the second to analyze the effects of many people switching from “snailmail” to email and other digital messages.

[link] (a) shows the shift in supply discussed in the following steps.

Step 1. Draw a demand and supply model to illustrate what the market for the U.S. Postal Service looked like before this scenario starts. The demand curve D 0 and the supply curve S 0 show the original relationships.

Questions & Answers

more explanation on GDP
Isaac Reply
it is a country total out put of goods and services divided by the total population of the country.I think it can also be derived from the country labour force,,because it mostly depend on the labour force and the level of technology .
labour force and technological progress leads to greater production increases the GDP
What is economics?
Bubu Reply
by this time
It is a social science that analyses production,distribution and consumption of goods and services
A social science that study human behavior in relationship with decision making
What are the typical patterns of GDP for a high-income economy like the United States in the long run and the short run?
mwangala Reply
What are the limitation and significant of macroeconomic
Usman Reply
explain the significance of concerpt of opportunity cost in planning
Mwanaid Reply
what is meant by the price elasticity of demand?
Martine Reply
when price of a commodity increase it's demand contracts , and whe the price of a commodity decreases it's demand expands so the degree of change in demand in response to change in own price of the commodity is called PED . Ed = percentage change in quantity demanded / percentage change in price
What are the limitations of macroeconomic and their segnificant
Usman Reply
Discuss the role of competition in stimulating economic growth?
Daniel Reply
competition stimulate economic growth because in such types of economy,they is no monopoly power every supplier will want to produce to meet customers choice which brings about quality production and attract invested and customers into such economy
competition creates Monopoly because of economy of scale. it's not antithesis but different side of same coin
competition result in high economic growth since every firm will intend to provide quality services and products to meet customers needs and requirements unlike in Monopoly situation where a firm just provide what it want to resulting in large stock piles of unwanted products ,ie inefficiency, howev
microeconomics study part of the economy but macroeconomic study the whole economy
Olokun Reply
studying the whole economy, solving the problem of the economy and building up the economy
micro means small while macro means large
standard of living is the footsteps of an economy because it plays important role for country to have crucial view about their budget ,import and export
it will be differ because economic agent will only take their views on some part of household
can opportunity cost be zero
OBED Reply
how many types of transportation do we have
yes. when a customer's purchasing power is high, he may have d ability to purchase all he needs, dt makes opportunity cost zero
please can give more explanation on this question
what are the factors production
Labour capital entrepreneurs
Land,capital, labour,and the entrepreneur
I will like to know use of calculus in economics
do they use it in economics?
I want to know if I should take calculus or statistics and probability my senior year of highschool
yes for example in monopolistic competitive market..... TR=TC* & THIS CALCULATED BY CHANGING( DERIVATIVE LAW) MR =MC ** WILL BE THE FORMULA THAT USE.
please in which topic in economic is the question coming from.
from PCF in economics
why is unitary proportional to responsiveness
Etim Reply
any tip for igcse economics exam?pls
Stacey Reply
What is a market
Divine Reply
what are the variables that affect demand
what are the variables that affect demand
what are the variables that affect demand
what are the variables that affect demand
what are the variables that affect demand
price of the related goods 2 price of the given commodity 3 income of the consumer 4 taste and preference 5 expectation in the future price
pls the taste and preference
explain briefly
a consumer taste and preference commodity changes for a time the man becomes
sorry sorry
is when the price of a commodity becomes high and can't afford example Samsung instead of iPhone
consumers who have high intense for goods will purchase the goods even if the price of that commodity increases because he or she preferred that commodity.people will be prefer iphone as its price increase
as usual bad taste of preference is when a consumer regrets from one commodity to another in terms of the price
thanks alot
you're welcome
#Preference; #Income #Test
#price Of Commodity #Income #Taste #Preference
#Market is The Place Where Buyers And Sellers Are Exchanging Their Goods And service. #
difference between macro and micro economics
Microeconomic Study about individual consumers market But Macroeconomis Study General economic Process Such As #Aggregate Demand #Aggregate Supples #GDp= #GNp
nice so can u run down a brife discussion on GDP

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Source:  OpenStax, Principles of economics. OpenStax CNX. Sep 19, 2014 Download for free at http://legacy.cnx.org/content/col11613/1.11
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