MICROECONIMICS
MICROECONIMICS
5th Edition
ISBN: 9781319372101
Author: KRUGMAN
Publisher: MAC HIGHER
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Chapter 13, Problem 6P
To determine

Consumer and producer surplus for De Beers and the perfectly competitive price.

Concept Introduction:

Consumer surplus is the difference between the total price that consumers are able and willing to pay for a good and the price they actually end up paying.

MICROECONIMICS, Chapter 13, Problem 6P , additional homework tip  1

Producer surplus is the difference between the price the sellers receive for their good and the price at which they are willing to sell their good for.

MICROECONIMICS, Chapter 13, Problem 6P , additional homework tip  2

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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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