Table 3. Main Characteristics of Treatment and Control Groups, 1992, 1994, 1996, and 1998.
| Treatment | Control | |||||||
|---|---|---|---|---|---|---|---|---|
|
|
|
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| 1992 | 1994 | 1996 | 1998 | 1992 | 1994 | 1996 | 1998 | |
| Average age (years) | 36.44 | 37.26 | 37.08 | 38.54 | 39.75 | 40.31 | 40.82 | 41.61 |
| Standard deviation | (10.63) | (11.17) | (10.63) | (10.78) | (10.22) | (10.44) | (10.12) | (9.84) |
| Education (percentage) | ||||||||
| Basic | 75.43 | 75.09 | 71.08 | 70.11 | 48.42 | 44.41 | 39.79 | 38.75 |
| High school | 11.70 | 10.72 | 14.44 | 15.72 | 17.98 | 18.74 | 19.05 | 20.85 |
| Undergraduate or more | 12.85 | 14.18 | 14.47 | 14.15 | 33.59 | 36.84 | 41.14 | 40.38 |
| Occupation (percentage) | ||||||||
| White collar | 18.08 | 18.05 | 19.07 | 21.42 | 29.81 | 29.13 | 34.38 | 34.31 |
| Blue collar | 60.78 | 59.23 | 56.53 | 55.64 | 24.60 | 25.93 | 20.51 | 21.15 |
| Services/sales | 21.13 | 22.71 | 24.39 | 22.93 | 45.58 | 44.92 | 45.09 | 44.52 |
| Average ln consumption | 8.24 | 8.25 | 8.10 | 8.15 | 8.54 | 8.53 | 8.41 | 8.44 |
| Standard deviation | (0.70) | (0.73) | (0.65) | (0.65) | (0.66) | (0.69) | (0.64) | (0.68) |
| Observations | 2,333 | 2,686 | 2,763 | 1,914 | 634 | 779 | 887 | 676 |
Notes: ln = natural logarithm. We dropped 376 observations from the treatment sample in 1998 that corresponded to individuals of the new generation who enrolled with IMSS in the first year after the social security reform.