This paper investigates the causal effect of job training on wage rates in the presence of firm heterogeneity. When … training affects worker sorting to firms, sample selection is no longer binary but is "multilayered". This paper extends the … job training on wage rates across firms with a weighted-average of the contrast in wages between different firms for a …

body of evidence on what kinds of in-service teacher training interventions are most effective, and highlights the … knowledge gaps. It reveals the dearth of detail on the nature of teacher training interventions and proposes a standard set of … indicators-the In-Service Teacher Training Survey Instrument-for reporting on such programs as a prerequisite for understanding …