Frontmatter -- Inhalt des 228. Sandes -- Inhalt / Contents -- Contributions to Labormetrics: Guest Editorial -- Abhandlungen / Original Papers -- Two-Sided Learning with Applications to Labor Turnover and Worker Displacement -- Wages, Hours and Human Capital Over the Life Cycle -- The Phillips Curve and NAIRU Revisited: New Estimates for Germany -- The Aging of the Unions in West Germany, 1980-2006 -- The Causes and Consequences of Adopting a Works Council -- Company-Level Pacts for Employment -- Parental Background and Earnings: German Evidence on Direct and Indirect Relationships -- Relative Demand and Supply of Skills and Wage Rigidity in the United States, Britain, and Western Germany -- The Effects of Active Labor Market Programs in Germany: An Investigation Using Different Definitions of Non-Treatment -- Dynamic Panel Data Models with Spatial Correlation -- Assessing the Rationality of Survey Expectations: The Probability Approach -- Measuring Research Intensity from Anonymized Data: Does Multiplicative Noise with Factor Structure Save Results Regarding Quotients? -- Buchbesprechung / Book Review -- Backmatter