'data.frame': 41498 obs. of 62 variables: $ year : num 1948 1948 1948 1948 1948 ... $ resid : num 1001 1002 1003 1004 1005 ... $ weight1 : num 1 1 1 1 1 1 1 1 1 1 ... $ weight2 : num 1 1 1 1 1 1 1 1 1 1 ... $ weight3 : num 1 1 1 1 1 1 1 1 1 1 ... $ age : num NA NA NA NA NA NA NA NA NA NA ... $ gender : Factor w/ 3 levels "0. na/ no pre iw (1948, 1952)",..: 2 3 3 3 2 3 2 3 2 2 ... $ race : Factor w/ 7 levels "1. white","2. black",..: 1 1 1 1 1 1 1 1 1 1 ... $ educ1 : Factor w/ 5 levels "0. dk/ na/ no pre iw (1952)/ short-form",..: 2 3 3 4 4 3 2 2 3 3 ... $ urban : Factor w/ 4 levels "0. na (1948)/ telephone (rdd) sample (20",..: NA NA NA NA NA NA NA NA NA NA ... $ region : Factor w/ 5 levels "0. na(1948)",..: NA NA NA NA NA NA NA NA NA NA ... $ income : Factor w/ 6 levels "0. dk/ na/ refused to answer/ inap, no p",..: 4 6 5 6 5 6 5 2 5 5 ... $ occup1 : Factor w/ 7 levels "0. na/member of armed forces/inap,no pre",..: NA NA NA NA NA NA NA NA NA NA ... $ union : Factor w/ 3 levels "0. dk/na/inap, question not used (1962)/",..: 2 3 3 3 3 3 3 3 2 2 ... $ religion : Factor w/ 5 levels "0. dk/na/refused to answer/ no post (196",..: 2 2 3 2 3 2 2 2 2 3 ... $ educ2 : Factor w/ 9 levels "0. inap, question not used",..: NA NA NA NA NA NA NA NA NA NA ... $ educ3 : Factor w/ 10 levels "0. inap, question not used",..: NA NA NA NA NA NA NA NA NA NA ... $ martial_status : Factor w/ 9 levels "0. inap, question not used",..: NA NA NA NA NA NA NA NA NA NA ... $ occup2 : Factor w/ 7 levels "0. na/ member of armed forces/ no pre (1",..: NA NA NA NA NA NA NA NA NA NA ... $ icpsr_cty : num NA NA NA NA NA NA NA NA NA NA ... $ fips_cty : num NA NA NA NA NA NA NA NA NA NA ... $ partyid7 : Factor w/ 9 levels "0. dk/ na/ other/ refused to answer/ inap",..: NA NA NA NA NA NA NA NA NA NA ... $ partyid3 : Factor w/ 5 levels "0. dk/ na/ other/ refused to answer/ no",..: NA NA NA NA NA NA NA NA NA NA ... $ partyid3_b : Factor w/ 4 levels "0. dk/ na/ other/ refused to answer/ no",..: NA NA NA NA NA NA NA NA NA NA ... $ str_partyid : Factor w/ 5 levels "0. dk/ na/ other/ refused to answerl no",..: NA NA NA NA NA NA NA NA NA NA ... $ father_party : Factor w/ 6 levels "0. na/inap/no pre iw(1952)/ no father/ n",..: NA NA NA NA NA NA NA NA NA NA ... $ mother_party : Factor w/ 6 levels "0. na/ inap/ no pre iw(1952)/ no mother/",..: NA NA NA NA NA NA NA NA NA NA ... $ dlikes : num NA NA NA NA NA NA NA NA NA NA ... $ rlikes : num NA NA NA NA NA NA NA NA NA NA ... $ dem_therm : num NA NA NA NA NA NA NA NA NA NA ... $ rep_therm : num NA NA NA NA NA NA NA NA NA NA ... $ regis : num NA NA NA NA NA NA NA NA NA NA ... $ vote : Factor w/ 3 levels "0. dk/na/inap, no post iw(1952,60,64...)",..: 3 3 3 3 3 3 3 3 3 3 ... $ regisvote : Factor w/ 4 levels "0. dk/na if voted/dk/na if registered/in",..: NA NA NA NA NA NA NA NA NA NA ... $ presvote : Factor w/ 4 levels "0. dk/na if voted/didn't vote for pres/i",..: 2 3 2 3 2 3 3 2 3 2 ... $ presvote_2party: Factor w/ 3 levels "0. dk/na if voted/didn't vote for pres/i",..: 2 3 2 3 2 3 3 2 3 2 ... $ presvote_intent: Factor w/ 6 levels "0. dk(1964 only)/na/inap/no pre iw(1948,",..: 2 3 4 3 2 3 3 2 3 2 ... $ ideo_feel : num NA NA NA NA NA NA NA NA NA NA ... $ ideo7 : Factor w/ 9 levels "0. na/inap,no post iw(1972)/form iii,iv(",..: NA NA NA NA NA NA NA NA NA NA ... $ ideo : Factor w/ 7 levels "0. na to follow-up/inap, r not admin 7pt",..: NA NA NA NA NA NA NA NA NA NA ... $ cd : num NA NA NA NA NA NA NA NA NA NA ... $ state : num NA NA NA NA NA NA NA NA NA NA ... $ inter_pre : num NA NA NA NA NA NA NA NA NA NA ... $ inter_post : num NA NA NA NA NA NA NA NA NA NA ... $ black : num 0 0 0 0 0 0 0 0 0 0 ... $ female : num 0 1 1 1 0 1 0 1 0 0 ... $ age_sq : num NA NA NA NA NA NA NA NA NA NA ... $ rep_presvote : num 0 1 0 1 0 1 1 0 1 0 ... $ rep_pres_intent: num 0 1 NA 1 0 1 1 0 1 0 ... $ south : num NA NA NA NA NA NA NA NA NA NA ... $ real_ideo : num NA NA NA NA NA NA NA NA NA NA ... $ presapprov : Factor w/ 3 levels "0. dk/na/inap, form ii(1972)/ question n",..: NA NA NA NA NA NA NA NA NA NA ... $ perfin1 : Factor w/ 5 levels "0. na/inap,no post(1968,72)/form ii,iii,",..: NA NA NA NA NA NA NA NA NA NA ... $ perfin2 : num NA NA NA NA NA NA NA NA NA NA ... $ perfin : num NA NA NA NA NA NA NA NA NA NA ... $ presadm : num -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... $ age_10 : num NA NA NA NA NA NA NA NA NA NA ... $ age_sq_10 : num NA NA NA NA NA NA NA NA NA NA ... $ newfathe : num NA NA NA NA NA NA NA NA NA NA ... $ newmoth : num NA NA NA NA NA NA NA NA NA NA ... $ parent_party : num NA NA NA NA NA NA NA NA NA NA ... $ white : num 1 1 1 1 1 1 1 1 1 1 ... - attr(*, "datalabel")= chr "" - attr(*, "time.stamp")= chr "21 Nov 2004 22:13" - attr(*, "formats")= chr [1:62] "%9.0g" "%9.0g" "%9.0g" "%9.0g" ... - attr(*, "types")= int [1:62] 254 254 254 254 254 254 254 254 254 254 ... - attr(*, "val.labels")= chr [1:62] "" "" "" "" ... - attr(*, "var.labels")= chr [1:62] "year of study" "respondent number" "post-stratified pre - type 0 weight" "post-stratified pre - type 1 weight" ... - attr(*, "version")= int 8 - attr(*, "label.table")=List of 42 ..$ vcf1016 : Named int 99 .. ..- attr(*, "names")= chr "99. na/inap,no post(all pres yrs exc.195" ..$ vcf1015 : Named int 99 .. ..- attr(*, "names")= chr "99. na/inap, no pre(1952,60)/abbr.pre(19" ..$ vcf0901 : Named int [1:2] 0 99 .. ..- attr(*, "names")= chr [1:2] "00. inap, wrong distrcit id(2000)/questi" "99. na" ..$ vcf0900 : Named int [1:3] 0 98 99 .. ..- attr(*, "names")= chr [1:3] "00. na/wrong district id(2000)/question" "98. at large district" "99. district of columbia" ..$ vcf0880b: Named int [1:6] 0 1 3 5 8 9 .. ..- attr(*, "names")= chr [1:6] "0. inap, question not used" "1. getting better" "3. stayed the same" "5. getting worse" ... ..$ vcf0880 : Named int [1:5] 0 1 2 3 9 .. ..- attr(*, "names")= chr [1:5] "0. na/inap,no post(1968,72)/form ii,iii," "1. better now" "2. same" "3. worse now" ... ..$ vcf0849 : Named int [1:7] 0 1 3 5 7 8 9 .. ..- attr(*, "names")= chr [1:7] "0. na to follow-up/inap, r not admin 7pt" "1. liberal" "3. moderate ('middle of the road')" "5. conservative" ... ..$ vcf0803 : Named int [1:9] 0 1 2 3 4 5 6 7 9 .. ..- attr(*, "names")= chr [1:9] "0. na/inap,no post iw(1972)/form iii,iv(" "1. extremely liberal" "2. liberal" "3. slightly liberal" ... ..$ vcf0801 : Named int [1:5] 0 49 97 98 99 .. ..- attr(*, "names")= chr [1:5] "00. most liberal" "49. neutral" "97. most conservative" "98. dk in vcf0211 or vcf0212/don't recog" ... ..$ vcf0713 : Named int [1:6] 0 1 2 3 4 9 .. ..- attr(*, "names")= chr [1:6] "0. dk(1964 only)/na/inap/no pre iw(1948," "1. democratic candidate (with or without" "2. republican candidate (with or without" "3. undecided/ dk (exc.1964)" ... ..$ vcf0704a: Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. dk/na if voted/didn't vote for pres/i" "1. democrat" "2. republican" ..$ vcf0704 : Named int [1:4] 0 1 2 3 .. ..- attr(*, "names")= chr [1:4] "0. dk/na if voted/didn't vote for pres/i" "1. democrat" "2. republican" "3. major third party cand (wallace 1968/" ..$ vcf0703 : Named int [1:4] 0 1 2 3 .. ..- attr(*, "names")= chr [1:4] "0. dk/na if voted/dk/na if registered/in" "1. not registed, and did not vote" "2. registered, but did not vote" "3. voted (registered)" ..$ vcf0702 : Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. dk/na/inap, no post iw(1952,60,64...)" "1. no, did not vote" "2. yes, voted" ..$ vcf0701 : Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. dk/na/inap, no pre iw(1952,60)/form i" "1. no" "2. yes" ..$ vcf0450 : Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. dk/na/inap, form ii(1972)/ question n" "1. approve" "2. disapprove" ..$ vcf0426 : Named int [1:3] 97 98 99 .. ..- attr(*, "names")= chr [1:3] "97. 97-100 degrees" "98. dk rating (exc. 1968)/ don't recogni" "99. na/ inap, no post iw(1968)/ question" ..$ vcf0424 : Named int [1:3] 97 98 99 .. ..- attr(*, "names")= chr [1:3] "97. 97-100 degrees" "98. dk rating (exc. 1968)/ don't recogni" "99. na/ inap, no post iw(1968)/ question" ..$ vcf0407 : Named int [1:4] -5 0 5 99 .. ..- attr(*, "names")= chr [1:4] "-5. maximum negative" "0. neutral" "5. maximum positive" "99. inap,no pre iw(1952,60)/form ii(1972" ..$ vcf0403 : Named int [1:4] -5 0 5 99 .. ..- attr(*, "names")= chr [1:4] "-5. maximum negative" "0. neutral" "5. maximum positive" "99. inap, no pre iw(1952,60)/form ii(197" ..$ vcf0307 : Named int [1:6] 0 1 2 3 4 9 .. ..- attr(*, "names")= chr [1:6] "0. na/ inap/ no pre iw(1952)/ no mother/" "1. democrat" "2. independent" "3. republican" ... ..$ vcf0306 : Named int [1:6] 0 1 2 3 4 9 .. ..- attr(*, "names")= chr [1:6] "0. na/inap/no pre iw(1952)/ no father/ n" "1. democrat" "2. independent (some years also: shifter" "3. republican" ... ..$ vcf0305 : Named int [1:5] 0 1 2 3 4 .. ..- attr(*, "names")= chr [1:5] "0. dk/ na/ other/ refused to answerl no" "1. independent or apolitical" "2. leaning independent" "3. weak partisan" ... ..$ vcf0303a: Named int [1:4] 0 1 2 3 .. ..- attr(*, "names")= chr [1:4] "0. dk/ na/ other/ refused to answer/ no" "1. democrats (including leaners)" "2. indpendents and apolitical (1966 only" "3. republicans (including leaners)" ..$ vcf0303 : Named int [1:5] 0 1 2 3 9 .. ..- attr(*, "names")= chr [1:5] "0. dk/ na/ other/ refused to answer/ no" "1. democrats (including leaners)" "2. independents" "3. republicans (including leaners)" ... ..$ vcf0301 : Named int [1:9] 0 1 2 3 4 5 6 7 9 .. ..- attr(*, "names")= chr [1:9] "0. dk/ na/ other/ refused to answer/ inap" "1. strong democrat" "2. weak democrat" "3. independent-democrat" ... ..$ vcf0170d: Named int 0 .. ..- attr(*, "names")= chr "0. inap, question not used" ..$ vcf0170c: Named int 0 .. ..- attr(*, "names")= chr "0. inap, question not used" ..$ vcf0151 : Named int [1:7] 0 1 2 3 4 5 6 .. ..- attr(*, "names")= chr [1:7] "0. na/ member of armed forces/ no pre (1" "1. professional and managerial" "2. clerical and sales workers" "3. skilled, semi-skilled and service wor" ... ..$ vcf0147 : Named int [1:9] 0 1 2 3 4 5 7 8 9 .. ..- attr(*, "names")= chr [1:9] "0. inap, question not used" "1. married and living with spouse (or sp" "2. never married" "3. divorced" ... ..$ vcf0140a: Named int [1:10] 0 1 2 3 4 5 6 7 8 9 .. ..- attr(*, "names")= chr [1:10] "0. inap, question not used" "1. 8 grades or less ('grade school')" "2. 9-12 grades ('high school'), no diplo" "3. 12 grades, diploma or equivalency" ... ..$ vcf0140 : Named int [1:9] 0 1 2 3 4 5 6 8 9 .. ..- attr(*, "names")= chr [1:9] "0. inap, question not used" "1. 8 grades or less ('grade school')" "2. 9-12 grades ('high school'), no diplo" "3. 12 grades, diploma or equivalency" ... ..$ vcf0128 : Named int [1:5] 0 1 2 3 4 .. ..- attr(*, "names")= chr [1:5] "0. dk/na/refused to answer/ no post (196" "1. protestant" "2. catholic (roman catholic)" "3. jewish" ... ..$ vcf0127 : Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. dk/na/inap, question not used (1962)/" "1. yes, someone (1948: head) in househol" "2. no, no one in the household belongs t" ..$ vcf0115 : Named int [1:7] 0 1 2 3 4 5 6 .. ..- attr(*, "names")= chr [1:7] "0. na/member of armed forces/inap,no pre" "1. professional and managerial" "2. clerical and sales workers" "3. skilled, semi-skilled and service wor" ... ..$ vcf0114 : Named int [1:6] 0 1 2 3 4 5 .. ..- attr(*, "names")= chr [1:6] "0. dk/ na/ refused to answer/ inap, no p" "1. 0 to 16 percentile" "2. 17 to 33 percentile" "3. 34 to 67 percentile" ... ..$ vcf0112 : Named int [1:5] 0 1 2 3 4 .. ..- attr(*, "names")= chr [1:5] "0. na(1948)" "1. northeast (ct,me,ma,nh,nj,ny,pa,ri,vt" "2. north central(il,in,ia,ks,mi,mn,mo,ne" "3. south (al,ar,de,d.c.,fl,ga,ky,la,md,m" ... ..$ vcf0111 : Named int [1:4] 0 1 2 3 .. ..- attr(*, "names")= chr [1:4] "0. na (1948)/ telephone (rdd) sample (20" "1. central cities" "2. suburban areas" "3. rural, small towns, outlying and adja" ..$ vcf0110 : Named int [1:5] 0 1 2 3 4 .. ..- attr(*, "names")= chr [1:5] "0. dk/ na/ no pre iw (1952)/ short-form" "1. grade school of less (0-8 grades)" "2. high school (12 grades or fewer, incl" "3. some college(13 grades or more,but no" ... ..$ vcf0106a: Named int [1:7] 1 2 3 4 5 7 9 .. ..- attr(*, "names")= chr [1:7] "1. white" "2. black" "3. asian" "4. native american" ... ..$ vcf0104 : Named int [1:3] 0 1 2 .. ..- attr(*, "names")= chr [1:3] "0. na/ no pre iw (1948, 1952)" "1. male" "2. female" ..$ vcf0101 : Named int [1:4] 0 97 98 99 .. ..- attr(*, "names")= chr [1:4] "00. na/ dk/ rf/ inap, no pre iw (1952)/" "97. 97 years old (1952, 1974, 1996 and l" "98. 98 years old (1958-1962, 1966, 1968:" "99. 99 years old (1976-1990, 1994: or ol"