Dataset: approval
Generated on: 2025-08-05
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approval              package:wooldridge               R Documentation

approval

Description:

     Wooldridge Source: Harbridge, L., J. Krosnick, and J.M. Wooldridge
     (forthcoming), “Presidential Approval and Gas Prices: Sociotropic
     or Pocketbook Influence?” in New Explorations in Political
     Psychology, ed. J. Krosnick. New York: Psychology Press (Taylor
     and Francis Group). Professor Harbridge kindly provided the data,
     of which I have used a subset. Data loads lazily.

Usage:

     data('approval')
     
Format:

     A data.frame with 78 observations on 16 variables:

        • *id: * id

        • *month: * month

        • *year: * year

        • *sp500: * S&P 500 index

        • *cpi: * Consumer Price Index

        • *cpifood: * CPI for food

        • *approve: * Gallup approval rate, percent

        • *gasprice: * average gas price, cents

        • *unemploy: * unemployment rate, percent

        • *katrina: * =1 for three months after Hurricane Katrina

        • *rgasprice: * real gas price, 100*(gasprice/cpi)

        • *lrgasprice: * log(rgasprice)

        • *sep11: * =1 for 09/2001 and two months following

        • *iraqinvade: * =1 for three months after Iraq invasion

        • *lsp500: * log(sp500)

        • *lcpifood: * log(cpifood)

Used in Text:

     343, 371, 400

Source:

     <http://www.cengage.com/c/introductory-econometrics-a-modern-approach-6e-wooldridge>

Examples:

      str(approval)