name of dataset: jtrain
no of variables: 30
no of observations: 471

+----------+---------------------------------+
| variable | label                           |
+----------+---------------------------------+
| year     | 1987, 1988, or 1989             |
| fcode    | firm code number                |
| employ   | # employees at plant            |
| sales    | annual sales, $                 |
| avgsal   | average employee salary         |
| scrap    | scrap rate (per 100 items)      |
| rework   | rework rate (per 100 items)     |
| tothrs   | total hours training            |
| union    | =1 if unionized                 |
| grant    | = 1 if received grant           |
| d89      | = 1 if year = 1989              |
| d88      | = 1 if year = 1988              |
| totrain  | total employees trained         |
| hrsemp   | tothrs/totrain                  |
| lscrap   | log(scrap)                      |
| lemploy  | log(employ)                     |
| lsales   | log(sales)                      |
| lrework  | log(rework)                     |
| lhrsemp  | log(1 + hrsemp)                 |
| lscrap_1 | lagged lscrap; missing 1987     |
| grant_1  | lagged grant; assumed 0 in 1987 |
| clscrap  | lscrap - lscrap_1; year > 1987  |
| cgrant   | grant - grant_1                 |
| clemploy | lemploy - lemploy[_n-1]         |
| clsales  | lavgsal - lavgsal[_n-1]         |
| lavgsal  | log(avgsal)                     |
| clavgsal | lavgsal - lavgsal[_n-1]         |
| cgrant_1 | cgrant[_n-1]                    |
| chrsemp  | hrsemp - hrsemp[_n-1]           |
| clhrsemp | lhrsemp - lhrsemp[_n-1]         |
+----------+---------------------------------+

H. Holzer, R. Block, M. Cheatham, and J. Knott (1993), “Are Training
Subsidies Effective? The Michigan Experience,” Industrial and Labor
Relations Review 46, 625-636. The authors kindly provided the data.