ECON 202 Lecture 3: Chap3-Spring2016

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tanmanatee226

7 Jul 2016

School

University of Waterloo

Department

Economics

Course

ECON 202

Professor

Joseph Dejuan

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Document Summary

Factors of production (inputs) include: labor (l) and capital (k: both factors are assumed to be exogenous and fixed over time: Is a description of how much output, y, is produced for any given amounts of factor inputs: F k l where f is the function that translates k and l into y: two observations on a production function: An efficient, developed economy generally produces more with the same quantity of capital and labor than an inefficient, primitive economy. The shares of labor and capital income in the u. s. economy have remained relatively constant over time at about 70% labor and 30% capital. The cobb-douglas production function incorporates the two ideas: Ak l where a describes productivity (total factor productivity) From the perspective of workers, labor productivity is the amount of output produced per unit of labor: unlike labor productivity, total factor productivity (tfp) takes into account how productive labor and capital are together.

Related Questions

Consider an economy with the following production function:

Y = AK.5L.5
The labor force is constant. The rate of depreciation is Î´ = .1, the savings rate is s = .3.

a. Has this production function constant returns to scale? Why?

b. Write the production function in per worker variables.

c. Does the per worker production function have diminishing marginal returns to capital? Why?

d. Write the fundamental Solow equation in per worker variables.

e. Depict the steady state of this economy.

f. What are the growth rates of per worker output and capital in steady state?

g. Calculate the steady state level of capital, output, consumption and savings.

h. Redraw the initial equilibrium and show what happens when the savings rate increases. Do the growth

rates change?

i. Redraw the initial equilibrium and show what happens when there is a one time increase in population.

. Do the growth rates change?

j. Redraw the initial equilibrium and show what happens when there is a one time innovation that increases

productivity. Do the growth rates change?

k. Redraw the initial equilibrium and show what happens when there is constant productivity growth. Do

the growth rates change?

Country A is located on a small island that is isolated from the outside world. The country
has one representative consumer, whose preference is represented by:
U(c, l) = ln(c) + ln(l)
There is one representative fi rm in the economy which is owned by the consumer, it produces
one type of good that can be used for consumption or government expenditure using capital
and labour as inputs. The fi rm owns the capital it uses and it's production technology is
represented by
F(K;N) = zK^aN^1-a
where z is the total factor productivity, and a is the capital share of income. The fi rm pays
all of its profit back to consumer as dividend.
The government of country A spend a predetermined G amount of goods to provide public
services, and it taxes consumer through a lump-sum tax t to finance the expenditure. the
government's budget is balanced:
G = t
Now, suppose that the firm cannot change its capital stock, or improve its production technology in the short period, such that z and K are given.
(a) When describing this economy as an macroeconomic model, what is the set of exogenous
variables? What is the set of endogenous variables that can be determined given the set
of exogenous variables using the concept of Competitive Equilibrium?
(b) Defi ne the competitive equilibrium for this economy, be specific about what it is, what
conditions have to be satisfied who solves what problem and etc.
(c) List the set of equations that will be used to determine all of the endogenous variables.
Which four of these endogenous variables are essentials, such that once you know these
four, all other endogenous variables can be obtained easily?
(d) Write down the four equations that can be used to solve for these four essential endogenous variables, and describe where do they come from. Describe in details the steps of
how would you solve for the competitive equilibrium (without actually solving for it ).
(e) Setup the Social planner's problem for this economy. What is the marginal condition
that pins down the planner's choices.
(f) Now, describe what would happen to c, l, and w if the firm had more capital, such
that Knew > Kold.

ECON 202 Lecture 3: Chap3-Spring2016

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