All specifications control for age, a quadratic term for age, education indicators, gender, and race.
All three specifications control for age and time fixed effects to account for these essential differences between the US and Australian data.
Many different methods have been used to generate artificial RAP and they often modify the American Association of State Highway and Transportation Officials AASHTOO) R30 specification for oven aging gyratory compaction cylinders.
All specifications include indicators for age and education; specification (2) includes white and black metro-level percent employed in manufacturing, percent farming, and average years of education.
All specifications include indicators for age and education; specification (2) includes white and black metro-level percent employed in manufacturing, percent farming, and average years of education; specification (3) includes the metro level average dependent variable, lagged one decade; specification (4) includes metro-level average variables and a lagged mean dependent variable.
This makes the estimates less vulnerable for functional form assumptions, for instance, about the specification of age.
The estimates are robust for the discontinuity sample or the specification of age.
For each discontinuity sample, we show the results of a linear and quadratic specification of age.
All specifications include controls for age, age square, marital status, disability, visible minority status, primary earner status, spoken language, regional fixed effects for 10 provinces, location of study fixed effects, and industry fixed effects for 21 categories.
