Code Book for Ascii File nls.dat Note: For more information, see the original article: David Card, "Using Geographic Variation in College Proximity to Estimate the Return to Schooling" NBER Working Paper 4832, August 1994 This article is published (with the same title and identical tables) in Aspects of Labour Market Behaviour: Essays in Honour of John Vandekamp" edited by Louis N. Christofides, E. Kenneth Grant, and Robert Swidinsky Toronto: University of Toronto Press, 1995. The file contains 3613 observations on men in 1976 cross-section of nls young men (original nls cohort) Missing value code is . Column Locations Variable Name and Label ---------------------------------------------------------------------- 1 - 5 id /*sequential id runs from 1 to 5225 */ 7 - 7 nearc2 /*grew up near 2-yr college*/ 10 - 10 nearc4 /*grew up near 4-yr college*/ 12 - 13 nearc4a /*grew up near 4-yr public college*/ 15 - 16 nearc4b /*grew up near 4-yr priv college*/ 18 - 19 ed76 /*educ in 1976*/ 21 - 22 ed66 /*educ in 1966*/ 24 - 25 age76 /* age in 1976 27 - 31 daded /*dads education missing=avg*/ 33 - 33 nodaded /* 1 if dad ed imputed*/ 35 - 39 momed /*moms education*/ 41 - 41 nomomed /* 1 if mom ed imputed*/ 43 - 54 weight /* nls weight for 1976 cross-section */ 56 - 56 momdad14 /*1 if live with mom and dad age 14*/ 58 - 58 sinmom14 /*lived with single mom age 14*/ 60 - 60 step14 /*lived step parent age 14*/ 62 - 62 reg661 /* dummy for region=1 in 1966 */ 64 - 64 reg662 /* dummy for region=2 in 1966 */ 66 - 66 reg663 /* dummy for region=3 in 1966 */ 68 - 68 reg664 70 - 70 reg665 72 - 72 reg666 74 - 74 reg667 76 - 76 reg668 78 - 78 reg669 /* dummy for region=9 in 1966 */ 80 - 80 south66 /*lived in south in 1966*/ 82 - 82 work76 /* worked in 1976*/ 84 - 84 work78 /* worked in 1978*/ 86 - 97 lwage76 /*log wage (outliers trimmed) 1976 */ 99 -110 lwage78 /*log wage in 1978 outliers trimmed */ 112 -112 famed /*mom-dad education class 1-9*/ 114 -114 black /* 1 if black*/ 116 -116 smsa76r /*in smsa in 1976*/ 118 -118 smsa78r /*in smsa in 1978*/ 120 -120 reg76r /*in south in 1976*/ 122 -122 reg78r /*in south in 1978*/ 124 -124 reg80r /* in south in 1980*/ 126 -126 smsa66r /* in smsa in 1966*/ 128 -132 wage76 /*raw wage cents per hour 1976*/ 134 -138 wage78 140 -144 wage80 146 -146 noint78 /*1 if noninterview in 78*/ 148 -148 noint80 150 -150 enroll76 /*1 if enrolled in 76*/ 152 -152 enroll78 154 -154 enroll80 156 -157 kww /*the kww score*/ 159 -161 iq /* a normed iq score*/ 163 -163 marsta76 /*mar status in 1976 1=married, sp. present * 165 -165 marsta78 167 -167 marsta80 169 -169 libcrd14 /*1 if lib card in home age 14*/ List of means, min/max Note some vars are missing for some observations. Missing value code is . Variable N Mean Std Dev Minimum Maximum ---------------------------------------------------------------------- ID 3613 2609.78 1498.51 2.0000000 5225.00 NEARC2 3613 0.4317741 0.4953919 0 1.0000000 NEARC4 3613 0.6781068 0.4672669 0 1.0000000 NEARC4A 3613 0.4921118 0.5000070 0 1.0000000 NEARC4B 3613 0.1859950 0.3891565 0 1.0000000 ED76 3613 13.2252975 2.7497411 0 18.0000000 ED66 3613 10.7428730 2.4590854 0 18.0000000 AGE76 3613 28.1752007 3.1718104 24.0000000 34.0000000 DADED 3613 10.0028785 3.2960212 0 18.0000000 NODADED 3613 0.2241904 0.4171058 0 1.0000000 MOMED 3613 10.3421672 3.0293785 0 18.0000000 NOMOMED 3613 0.1143094 0.3182308 0 1.0000000 WEIGHT 3613 320318.35 168006.76 75607.00 1752340.00 MOMDAD14 3613 0.7921395 0.4058326 0 1.0000000 SINMOM14 3613 0.1001937 0.3002997 0 1.0000000 STEP14 3613 0.0384722 0.1923599 0 1.0000000 REG661 3613 0.0445613 0.2063671 0 1.0000000 REG662 3613 0.1549958 0.3619508 0 1.0000000 REG663 3613 0.1940216 0.3955003 0 1.0000000 REG664 3613 0.0691946 0.2538199 0 1.0000000 REG665 3613 0.2095212 0.4070232 0 1.0000000 REG666 3613 0.0929975 0.2904691 0 1.0000000 REG667 3613 0.1101578 0.3131296 0 1.0000000 REG668 3613 0.0309992 0.1733394 0 1.0000000 REG669 3613 0.0935511 0.2912434 0 1.0000000 SOUTH66 3613 0.4126764 0.4923837 0 1.0000000 WORK76 3613 0.8350401 0.3711957 0 1.0000000 WORK78 3613 0.7351232 0.4413287 0 1.0000000 LWAGE76 3010 6.2618319 0.4437977 4.6051702 7.7848893 LWAGE78 2639 6.3291080 0.4442450 4.6965200 8.2409240 FAMED 3613 5.9128148 2.6504318 1.0000000 9.0000000 BLACK 3613 0.2300028 0.4208925 0 1.0000000 SMSA76R 3613 0.6947135 0.4605924 0 1.0000000 SMSA78R 3319 0.6929798 0.4613273 0 1.0000000 REG76R 3613 0.3996679 0.4898978 0 1.0000000 REG78R 3319 0.3968063 0.4893089 0 1.0000000 REG80R 3227 0.4028509 0.4905473 0 1.0000000 SMSA66R 3613 0.6426792 0.4792768 0 1.0000000 WAGE76 3017 576.0888300 263.8199090 25.0000000 2404.00 WAGE78 2656 724.5591114 526.1991520 17.0000000 17628.00 WAGE80 2520 869.8940476 492.1729068 27.0000000 13857.00 NOINT78 3613 0.0813728 0.2734447 0 1.0000000 NOINT80 3613 0.1068364 0.3089479 0 1.0000000 ENROLL76 3613 0.0946582 0.2927827 0 1.0000000 ENROLL78 3317 0.0654206 0.2473038 0 1.0000000 ENROLL80 3220 0.0583851 0.2345066 0 1.0000000 KWW 3543 33.4891335 8.6918079 0 56.0000000 IQ 2470 102.5878543 15.4450703 50.0000000 156.0000000 MARSTA76 3604 2.3571032 2.1096377 1.0000000 6.0000000 MARSTA78 3319 2.2136186 2.0058342 1.0000000 6.0000000 MARSTA80 3227 2.1041215 1.9088835 1.0000000 6.0000000 LIBCRD14 3598 0.6717621 0.4696372 0 1.0000000 ----------------------------------------------------------------------