Tarefa crb_papers.q018

Veredito

Pergunta feita ao analista

By how many percentage points did Section 5 preclearance coverage change Black voter registration (share of the Black voting-age population) in covered North Carolina counties from 1960 to 1966 compared with uncovered counties?

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Verificações

Caminho de referência e caminho do agente

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Trajetória

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1. 0Início

   By how many percentage points did Section 5 preclearance coverage change Black voter registration (share of the Black voting-age population) in covered North Carolina counties from 1960 to 1966 compared with uncovered counties?

   ds_0010 (agent)

   | Variable Name | Description | | --- | --- | | county_id | Numeric identifier for a North Carolina county (1–100). Stable across years. | | year | Calendar year of the observation (1958–1993). Not all measures are available every year. | | pop_t_i_ln | Natural logarithm of total county resident population. Population counts come from the U.S. Census via NHGIS and are linearly interpolated for non-decennial years. | | pop_b_i_perc | Share of the county’s total population that is Black (0–1). Based on U.S. Census counts via NHGIS, linearly interpolated between decennial enumerations. | | inc_hh_med_i | Median household income for the county, as reported in Census data via NHGIS. Values for non-decennial years are linearly interpolated; units reflect source-year dollars. | | educ_25p_i | Median years of schooling among county residents age 25 and older. Derived from U.S. Census data via NHGIS and linearly interpolated for non-decennial years. | | p_vreg_w | White voter registration as a share of the white voting-age population (0–1+, where values can exceed 1.0 due to unpurged names on voter rolls). Compiled from state and federal administrative sources. | | p_vreg_bnw | Black voter registration as a share of the Black voting-age population (0–1+, where values can exceed 1.0 due to unpurged names on voter rolls). Compiled from state and federal administrative sources. | | post_x_covered | Indicator equal to 1 for county-years from 1966 onward in counties subject to Section 5 preclearance of the Voting Rights Act; 0 otherwise. North Carolina had partial county coverage (40 of 100 counties), determined using a federal turnout benchmark from the 1964 election. | | tag_vreg_bnw | Auxiliary tag associated with the Black registration series. Coding details are not specified in this file; treat as a metadata flag accompanying p_vreg_bnw. | Dataset Context: This file is a county–year panel for North Carolina covering 1958–1993. It brings together historical measures of voter registration by race with core county demographics to document changes in political participation over a period spanning the passage and implementation of the Voting Rights Act of 1965 (VRA). Registration by race prior to the mid-1960s is available for 1958 and 1960 from the U.S. Commission on Civil Rights. After the VRA, registration figures were compiled from the North Carolina State Board of Elections, Inter-university Consortium for Political and Social Research (ICPSR) series, and the Voter Education Project. Post-1965 registration is observed in 1966–1968, then generally every two years from 1970 through 1988, with additional coverage in 1971 and 1993. Registration measures use the voting-age population (VAP) of the corresponding racial group as the denominator. Because county rolls were not always purged of deceased or migrated individuals (“deadwood”), the registration share can occasionally exceed 100%. Demographic measures—total population (logged), racial composition, median household income, and median years of schooling among adults 25+—are drawn from the U.S. Census via NHGIS. To provide annual coverage, values are linearly interpolated between decennial census years. Units for income reflect source-year dollars, and education is recorded in years. The period also spans a major policy environment: Section 5 of the VRA required certain jurisdictions to obtain federal approval (“preclearance”) for changes to voting practices. North Carolina was unique among the initially covered states in having partial county coverage—40 of its 100 counties—based on a federally applied turnout benchmark from the 1964 election. The dataset includes an indicator flagging county-years after 1965 in covered counties to reflect when preclearance was in effect. Overall, the panel structure allows users to observe evolving registration patterns by race alongside demographic shifts under this policy regime, with variable availability driven by the timing of administrative releases and census collections.

   file 5a85d499ade6470cd3f43aa2a2a4ccda06ae13281bb710aa464f6b1747fc6cd1 · frame —

   ref_cov (reference)

   file 5a85d499ade6470cd3f43aa2a2a4ccda06ae13281bb710aa464f6b1747fc6cd1 · frame —

   1. select {"columns":["county_id","year","post_x_covered","p_vreg_bnw"]}
   2. collapse {"aggs":[{"column":"post_x_covered","fn":"max","name":"covered"}],"by":["county_id"]}

   ref_panel (reference)

   file 5a85d499ade6470cd3f43aa2a2a4ccda06ae13281bb710aa464f6b1747fc6cd1 · frame —

   1. select {"columns":["county_id","year","post_x_covered","p_vreg_bnw"]}
   2. filter {"query":"year in [1960, 1966]"}
   3. dropna {"columns":["p_vreg_bnw"]}
   4. merge {"how":"inner","on":["county_id"],"with":"ref_cov"}
   5. merge {"how":"left","on":["county_id"],"with":"ref_years"}
   6. filter {"query":"nyears == 2"}
   7. derive {"args":{"cmp":"eq","column":"year","value":1966},"name":"post","op":"indicator"}
   8. derive {"args":{"columns":["covered","post"]},"name":"did","op":"interaction"}

   ref_years (reference)

   file 5a85d499ade6470cd3f43aa2a2a4ccda06ae13281bb710aa464f6b1747fc6cd1 · frame —

   1. select {"columns":["county_id","year","post_x_covered","p_vreg_bnw"]}
   2. filter {"query":"year in [1960, 1966]"}
   3. dropna {"columns":["p_vreg_bnw"]}
   4. collapse {"aggs":[{"column":"p_vreg_bnw","fn":"count","name":"n"}],"by":["county_id","year"]}
   5. collapse {"aggs":[{"column":"n","fn":"count","name":"nyears"}],"by":["county_id"]}
2. 1Turno do modelo
   call_adb9f74bnaive-olsFim: tool_use0 ms0 de entrada · 0 de saída · 0 de raciocínio · 0 em cache

   Texto visível

   Linha de base ingênua: regressão do resultado no tratamento, sem controles.

   Chamadas pedidas

   • infer.ols

     {
       "dataset": "ds_0010",
       "x": [
         "post_x_covered"
       ],
       "y": "p_vreg_bnw"
     }

   Mensagens (formato neutro)Instruções do sistemaFerramentas oferecidas
3. 2Ferramenta
   infer.olsv0.1.0call_aa34e22cdecidido pelo modeloreexecutável

   Motivo: Linha de base ingênua: regressão do resultado no tratamento, sem controles.

   Argumentos

   {
     "cluster": null,
     "controls": [],
     "dataset": "ds_0010",
     "fe": [],
     "intercept": true,
     "level": 0.95,
     "se": "HC1",
     "subset": null,
     "weights": null,
     "x": [
       "post_x_covered"
     ],
     "y": "p_vreg_bnw"
   }

   Figuras call_aa34e22c

   Chave	Valor	Valor bruto	Erro-padrão	IC
   coef.post_x_covered Coefficient on post_x_covered in the regression of p_vreg_bnw	-0,042873	-0.04287295735726074	0,01387410.013874143319872198	-0,0700852 – -0,0156607

   Diagnósticos

   • n_obs = 1.6951695
   • k = 22
   • r2 = 0,004508670.004508668935988558
   • df_resid = 1.6931693
   • se_type = "HC1"
   • n_clusters = —

   Tabelas (1)

   {
     "coefficients": [
       {
         "ci_high": 0.7132790732493043,
         "ci_low": 0.6730603439867321,
         "coef": 0.6931697086180182,
         "p": 0,
         "se": 0.010252733375791292,
         "t": 67.60828388015311,
         "term": "Intercept"
       },
       {
         "ci_high": -0.015660681689895147,
         "ci_low": -0.07008523302462633,
         "coef": -0.04287295735726074,
         "p": 0.002033235273454479,
         "se": 0.013874143319872198,
         "t": -3.0901336658280725,
         "term": "post_x_covered"
       }
     ]
   }

   Digests dos dados

   ds_0010 640cd4195615ce94a9a091ffdd5da5400cf509d342e8df366709f3572155738e

   sha256 do resultado

   926dec243a6b809f92c1070ccd5acea5645d687077343fe4b8830137a940abd7

   Resultado mostrado ao modelo
4. 3Turno do modelo
   call_5817d0a5naive-olsFim: tool_use0 ms0 de entrada · 0 de saída · 0 de raciocínio · 0 em cache

   Chamadas pedidas

   • submit_answer (meta-ferramenta)

     {
       "answer": "Estimativa ingênua (infer.ols): coef.post_x_covered = -0,04287.",
       "caveats": [],
       "figure_refs": [
         "call_aa34e22c:coef.post_x_covered"
       ]
     }

   Mensagens (formato neutro)Instruções do sistemaFerramentas oferecidas
5. 4Guarda
   resposta aceita

   Números encontrados

   -0,04287

   Sem lastro

   —

   Não citados

   —

   1 nova(s) tentativa(s) restante(s)
6. 5Resposta

   Estimativa ingênua (infer.ols): coef.post_x_covered = -0,04287.

   Figuras citadas: call_aa34e22c:coef.post_x_covered · Parada: answered

   Figura da resposta: call_aa34e22c:coef.post_x_covered = -0,042873-0.04287295735726074 (se 0,01387410.013874143319872198)
7. 6Pontuação
   #0resposta com lastropassouobrigatóriaevery number backed
8. 7Pontuação
   #1figura da resposta próximapassouobrigatória-0.04287295736 in [-0.1179775108, 0.187698196]?
9. 8Pontuação
   #2figura da resposta próximafalhouregistrada-0.04287295736 vs 0.03486034259007323
10. 9Pontuação
    #3figura da resposta próximafalhouregistrada0.01387414332 vs 0.07797849662288812

Épocas × verificações

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Cada tentativa é seu próprio arquivo e é publicada; só a última de cada época é pontuada.

• época 1, tentativa 1passoupontuada(exibindo)

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