M. Tiffen et M. Mortimore, MALTHUS CONTROVERTED - THE ROLE OF CAPITAL AND TECHNOLOGY IN GROWTH AND ENVIRONMENT RECOVERY IN KENYA, World development, 22(7), 1994, pp. 997-1010
Investment in technological improvements, coupled with management inno
vations and skills, are commonly held to lead to growth rates which ou
tpace population growth. Although this applies to both industry and ag
riculture (Anderson, 1990) typical farm surveys in developing countrie
s neglect to analyze fixed investments or the quality of management. T
his paper provides a nonmathematical case study and model from Kenya o
f the way in which investments in technological change, and especially
in land improvement, have enabled rural incomes per capita to grow su
bstantially, with improved environmental conservation, through the int
eractions of increased population density, improved information and ma
rket opportunities. Population density and investment are shown to be
critical interrelated factors. Investments require maintenance expendi
tures. These are included in social cost-benefit analysis, but it is n
ot always realized that labor on maintenance may have a rising opportu
nity cost, which farmers take into account when selecting technologies
. Although the major part of expenditures are made and managed by farm
ers, government investments to stimulate and complement them are requi
red. As on the farm, this requires wise management of recurrent and ma
intenance costs, if the benefits of investment are to be lasting.