Table 2. 2SLS Estimates of the (Cobb-Douglas) Body-Mass Production Function, by Survey Population.
| Dependent variable: log weight/height | ||
|---|---|---|
|
| ||
| Input/Survey population | 1981-2b | 2001-2 |
| Log individual total calorie consumptiona | .136 (3.37) | .241 (3.76) |
| Very active occupationa | −.0119 (0.23) | −.0445 (3.20) |
| Exceptionally active occupationa | −.0817 (1.26) | −.125 (5.65) |
| Pregnanta | .326 (1.34) | .0273 (1.33) |
| Lactatinga | .513 (4.65) | .0339 (1.39) |
| Log age | .0987 (1.90) | .00804 (9.02) |
| Log age squared | .0174 (2.37) | −.000092 (8.86) |
| Male | −.0578 (1.81) | −.00947 (2.89) |
| Male*log age | .0687 (4.04) | .00116 (3.72) |
| Water drawn from tube well | −.0406 (2.10) | .00551 (0.88) |
| Water drawn from well | −.0693 (3.15) | .00118 (0.18) |
| Water drawn from pond | −.0649 (2.55) | .0216 (2.36) |
| N | 1,737 | 5,750 |
| Hg: calories, age, age squared, male, exceptionally active, very active, male*age = across populations; χ2(7) (p) | 9.06 (.17) | |
Sources: NSRB 1981-2 and 2001-2.
a
Endogenous variable: instruments include household head's age and schooling level, land holdings, and price of all foods consumed interacted with individual age and sex variables, land and head's schooling and age.
b
Reproduced from Pitt et al. (1990). Asymptotic t-ratios in parentheses.