Social scientists are often interested in studying differences in groups, such as gender or race differences in attitudes, buying behaviors, or socioeconomic characteristics. When the researcher seeks to estimate group differences through the use of independent variables that are qualitative (i.e., measured at only the nominal level), dummy variables will allow the researcher to represent information about group membership in quantitative terms without imposing unrealistic measurement assumptions on the categorical variables. Beginning with the simplest model, Hardy probes the use of dummy variable regression in increasingly complex specifications, exploring issues such as: interaction, heteroscedasticity, multiple comparisons and significance testing, the use of effects or contrast coding, testing for curvilinearity, and estimating a piecewise linear regression.
- ISBN10 0803951280
- ISBN13 9780803951280
- Publish Date 23 April 1993
- Publish Status Active
- Publish Country US
- Imprint SAGE Publications Inc
- Format Paperback
- Pages 96
- Language English
- URL https://uk.sagepub.com/booksProdDesc.nav?prodId=Book3924