MANKIW: PRINCIPLES OF MACROECONOMICS
8th Edition
ISBN: 9781337801782
Author: Mankiw
Publisher: CENGAGE L
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Chapter 21.1, Problem 1QQ
To determine
Liquidity preference theory, interest rate, and aggregate demand.
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If all individuals’ preferences are complete, reflexive, and transitive, then so should be the social preference created by the voting rule.
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Eddie Clauer sells a wide variety of outdoor equipment and clothing. The company sells both through mail order and via the internet. Random samples of sales receipts
were studied for mail order sales and internet sales, with the total purchase being recorded for each sale. A random sample of 7 sales receipts for mail order sales
results in a mean sale amount of $81.10 with a standard deviation of $23.25. A random sample of 15 sales receipts for internet sales results in a mean sale amount of
$64.30 with a standard deviation of $28.25. Using this data, find the 90 % confidence interval for the true mean difference between the mean amount of mail order
purchases and the mean amount of internet purchases. Assume that the population variances are not equal and that the two populations are normally distributed.
Step 1 of 3: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Chapter 21 Solutions
MANKIW: PRINCIPLES OF MACROECONOMICS
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- 1. For the following utility functions, (i) calculate the MRS, (ii) show whether the MRS is constant, or diminishing, or increasing, (iii) calculate the degree of homogeneity, (iv) check the convexity of the Indifference Curve using the condition that for a function to be strict quasi-concave, it must be that f2f11-2f1f2f12+ ff22 < 0, (v) based on MRS's characteristics, draw an approximate Indifference Curve, and (vi) comment on the type of utility function. (a) U(x, y) = 3x + y (b) U(x, y)=√√x y (c) U(x, y)=√√x + y (d) U(x, y)=xy x+yarrow_forwardA 9R, where 1-b 1-b Question Two Consider the IS-LM Model. Let the IS equation be Y = (1b) is the marginal propensity to save, g is the investment sensitivity to interest rates, and A is an aggregate of exogenous variables. Let the LM equation be Y = +=R, where k and 1 are income and interest sensitivity of money demand, and Mo is real money balances. Mo k k It is given b = 0.7, g = 100, A = 252, k = 0.25, l = 200, and Mo 176. a) Utilize the given numbers to substitute the variables in the model, and then write down the IS-LM equation system in matrices form. b) Solve for the equilibrium values of Y and R using Cramer's Rule. (Note: Keep 2 digits after the decimal point.)arrow_forwardSuppose that a family's income is exactly the same as the poverty threshold. This family's income deficit would be and their ratio of income to poverty would be 130 0; 1 ○ 1 %3 030 Consider a family of four in 2008, whose poverty threshold is $22,024. If this family's total income was $16544, what would their income deficit be? Income deficit: $arrow_forward
- 3. Based on the 'Compensation Wage Differentials,' (CWD) answers the next questions: In an economy where workers only have two options in their daily lives: work in firm 1 and be at home. The next equation gives the labour supply for the firm 1, Ls¹(w) = -40 + w. a) How much is it willing to pay worker number 10 to stay at home? b) If a new firm (firm 2) is hiring in this market, and its supply of labour is Ls²(w) = -80+ w. Which firm (1 or 2) is considered an ‘uncomfortable' workplace? c) What is the CWD for the firm considered an ‘uncomfortable' workplace when it wants to hire employee number 10? d) Two industries require workers with the same characteristics (skills and experience). Industry B is recognized as having much more hazardous working conditions than Industry A. What is the CWD between the two industries? Industry A Industry B Demand Supply 5 10 15 20 25 5 10 15 20 Labor (Hours) Labor (Hours) Demand Supplyarrow_forwardWhat percentage of the total population is categorized as belonging to the second quintile? Give your responses as whole numbers. The data in the table characterizes the income distribution for a country. Income category first quintile Share of income Cumulative share of (%) income (%) 7.0 second quintile 15.0 22.0 third quintile 45.0 fourth quintile 29.0 fifth quintile 26.0 percentage of population in second quintile: % What percentage of the total income for the country is earned by the third quintile? percentage earned by the third quintile: % What is the cumulative share of income earned by the poorest 80% of the population? percentage earned by the poorest 80%: ୪୧arrow_forward1. Comment on the following ideas. You can say if they are true, false, or uncertain and argue your answers. a) Producers in competitive markets have incentives to reduce the quality of their products and the safety of their workplaces and to cheat consumers and workers generally. b) Labour unions raise the wages of all workers. c) Increasing the minimum wage will reduce employment in every type of market d) In a monopoly market, the demand for good Q shifts to the left, declining Q's price. However, because the monopoly short-run equilibrium is different from the perfect competition equilibrium, its demand for labour is unaffected.arrow_forward
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