Technological progress, organizational change and the size of the Human Resources Department



3.2 Household and human capital accumulation

The household in the economy has a utility function given by:

c1-τ    1

u (ct) = ct------1 τ > 0

t j 1 - τ

where ct is consumption, and to simplify the analysis we then assume τ = 1, that is:

u (ct)=lnct                                 (7)

The household is then endowed with one unit of time supplied each period,
that is spent on working (the fraction
Tts) or on human capital accumulation (the
fraction 1
- Tts), and the accumulation of human capital is described by the following
equation:

ht+ι = Et • h • (1 - /.             0 < δ < 1                  (8)

where Et is an efficiency parameter.

The household’s intertemporal optimization program in the decentralized econ-
omy is then given by11:

max             βt ln ct

{ct,Tts,at+1,ht+1}t=0       t=0

at+1 =(1+rt ) at + wt htTts - ct

s.t.

ht+1 = Ethtδ (1 - Tts)1-δ

where β is the discount factor (with 0 <β<1)andat represents the assets held at
time
t.

The Lagrangian for this problem is:

L = et ln ct + βtμt [(1 + rt) at + WthtTts - ct - at+i] +
t=0

+βt λt hEthtδ (1 - Tts )1-δ - ht+1 io

11 plus the standard transversality conditions.

14



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