Appendix Table A1

Determinants of the year of ultrasound adoption at the county level: OLS analysis using the 1980 county and provincial variables

 Dependent variable: Year of ultrasound adoption
County variables
    Log population−0.370*
(0.189)
    Log area of cultivated land per capita0.353
(0.268)
    Percent of land sown−0.111
(0.079)
    Percent of land irrigated0.930**
(0.473)
    Percent of land ploughed by tractors−0.631
(0.404)
    Log grain production per capita−0.009
(0.265)
    Log meat production per capita0.004
(0.202)
    Log power of farm machinery per capita−0.651***
(0.223)
    Log electricity consumption per capita−0.214*
(0.118)
Provincial variables
    Log per capita GDP−0.469
(0.515)
    Log fiscal expenditure per capita0.464
(0.541)
    Log number of beds per 1000 persons−2.700***
(0.665)
    Log number of doctors per 1000 persons2.612***
(0.668)
    Log number of teachers per 1000 persons−0.099
(0.365)
Observations506
R-squared0.14

  • Note: All counties that adopted ultrasound before 1980 are excluded in the sample. Reported in parentheses are robust standard errors.

  • ↵* denotes statistical significance at the 10 percent level,

  • ↵** at the 5 percent level,

  • ↵*** at the 1 percent level.