This paper is a contribution at raising awareness of the fact that the commercial activity, consisting primarily in buying and selling, has become so complex and from another point of view, so important for companies in their struggling for market share, that it cannot be anymore performed with...

We examine the extent to which education is a main determinant of affluence in Brazil. We focus on workers in the top 1% of the labor earnings distribution. We use university courses data from the Sample Questionnaire of the 2010 Census. Our main conclusion is that while education may be...

We examine the extent to which education is a main determinant of affluence in Brazil. We focus on workers in the top 1% of the labor earnings distribution. We use university courses data from the Sample Questionnaire of the 2010 Census. Our main conclusion is that while education may be...

This paper investigates how the precision and stability of a teacher's value-added estimate relates to the characteristics of the teacher's students. Using a large administrative data set and a variety of teacher value-added estimators, it finds that the stability over time of teacher...

Around 1870 the U.S. had no research universities of note, while today it accounts for the largest number in the world. Many accounts attribute this transformation to events surrounding World War II. In contrast, this paper traces its origins to reforms that began in the 1870s. We first explain...

We investigate whether commonly used value-added estimation strategies can produce accurate estimates of teacher effects. We estimate teacher effects in simulated student achievement data sets that mimic plausible types of student grouping and teacher assignment scenarios. No one method...

The federal government's Race to the Top competition has promoted the adoption of test-based performance measures as a component of teacher evaluations throughout many states, but the validity of these measures has been controversial among researchers and widely contested by teachers' unions. A...

Based on a unique time-use survey of academic researchers in Japan, this study finds that research time decreases over the life cycle. The decrease in total hours worked and the increase in time spent on administrative tasks explain the decrease in research time. We also show that the decrease...

How valuable is education for entrepreneurs’ performance as compared to employees’?What might explain any differences? And does education affect peoples’ occupationalchoices accordingly? We answer these questions based on a large panel of US labor forceparticipants. We show that education...

This paper investigates how the precision and stability of a teacher's value-added estimate relates to the characteristics of the teacher's students. Using a large administrative data set and a variety of teacher value-added estimators, it finds that the stability over time of teacher...