ESSENTIALS OF ECONOMICS
ESSENTIALS OF ECONOMICS
4th Edition
ISBN: 9781464188466
Author: KRUGMAN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 3, Problem 15P
To determine

Changes in the market for babysitting
(a) The market for an hour of babysitting services in middling this year.
(b) The market for an hour of babysitting services 14 years into the future
(c) The market for an hour of babysitting services 30 years into future.

Concept Introduction

Demand: The demand of a product or service in the market is derived by the willingness to purchase and ability of the consumers to pay for the purchase.

Supply: The supply of a product or service means making available a specific product or service to the consumers at a specific price.

Equilibrium Price: The equilibrium price is the market price at which the quantity demanded by the consumers equals the quantity supplied by the producers.

Equilibrium Quantity: The equilibrium quantity is that quantity where the demand and supply of a product or service is equal.

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Please answer questions D-H, I have already answered A , B,C but it may help you to still solve them yourself. Thank you!
2. A firm’s production function is given by:Q = 10KLThe unit capital and labour costs are 2 and 1 pounds respectively. The firm is contracted to produce2000 units.(a) Write out the optimisation problem of the firm. (b) Express this problem using a Lagrangian function. (c) Find values of K and L which fulfil the contract with minimal cost to the firm. (d) Calculate the total cost to the firm.
3. Consider the following estimated regression equation, estimated using a sample of firms, where RDis total firm spending on research and development in USD ($), Revenue is total firm revenuein USD ($), and W ages is the firms’ total spending on wages in USD ($) (standard errors inparentheses):RDd = 1000(600)+ 0.5(0.1)Revenue + 1.5(0.5)W ages,(a) Interpret the coefficients on each of the explanatory variables. (b) Which of the three coefficients are statistically significant at the 5% level of significance? Howdo you know? A researcher runs a two-sided statistical test of the null hypothesis that both the coefficients onthe explanatory variables above are jointly equal to 0.25 (mathematically, that β1 = β2 = 0.25),and reports a p-value of 0.045.(c) What does this p-value mean for the outcome of the test? (d) What would an appropriate two-sided alternative hypothesis look like?
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