Community-Based Production of Open Source Software: What Do We Know About the Developers Who Participate?

This paper seeks to close an empirical gap regarding the motivations, personal attributes and behavioral patterns among free/libre and open source (FLOSS) developers, especially those involved in community-based production, and its findings on the existing literature and the future directions for research. Respondents to an extensive web-survey’s (FLOSS-US 2003) questions about their reasons for work on FLOSS are classified according to their distinct “motivational profiles” by hierarchical cluster analysis. Over half of them also are matched to projects of known membership sizes, revealing that although some members from each of the clusters are present in the small, medium and large ranges of the distribution of project sizes, the mixing fractions for the large and the very small project ranges are statistically different. Among developers who changed projects, there is a discernable flow from the bottom toward the very small towards to large projects, some of which is motivated by individuals seeking to improve their programming skills. It is found that the profile of early motivation, along with other individual attributes, significantly affects individual developers’ selections of projects from different regions of the size range.Open source software, FLOSS project, community-based peer production, population heterogeneity, micro-motives, motivational profiles, web-cast surveys, hierarchical cluster analysis

Evaluating the impact of Mexico's quality schools program : the pitfalls of using nonexperimental data

The authors evaluate whether increasing school resources and decentralizing management decisions at the school level improves learning in a developing country. Mexico's Quality Schools Program (PEC), following many other countries and U.S. states, offers US$15,000 grants for public schools to implement five-year improvement plans that the school's staff and community design. Using a three-year panel of 74,700 schools, the authors estimate the impact of the PEC on dropout, repetition, and failure using two common nonexperimental methods-regression analysis and propensity score matching. The methods provide similar but nonidentical results. The preferred estimator, difference-in-differences with matching, reveals that participation in the PEC decreases dropout by 0.24 percentage points, failure by 0.24 percentage points, and repetition by 0.31 percentage points-an economically small but statistically significant impact. The PEC lacks measurable impact on outcomes in indigenous schools. The results suggest that a combination of increased resources and local management can produce small improvements in school outcomes, though perhaps not in the most troubled school systems.Tertiary Education,Education For All,Primary Education,Teaching and Learning,Secondary Education,Economics of Education

Scale Economies and Synergies in Horizontal Merger Analysis

Three years ago, the Antitrust Division and the Federal Trade Commission revised their Horizontal Merger Guidelines to articulate in greater detail how they would treat claims of efficiencies associated with horizontal mergers: claims that are frequently made, as for instance in the recently proposed merger between Heinz and Beech-Nut in the market for baby food. While these revisions to the Guidelines have a solid economic basis, they leave open many questions, both in theory and in practice. In this essay, we evaluate some aspects of the treatment of efficiencies, based on three years of enforcement experience under the revised Guidelines, including several litigated mergers, and based on economic principles drawn from oligopoly theory regarding cost savings, competition, and consumer welfare.

Compensatory education for disadvantaged Mexican students : an impact evaluation using propensity score matching

The authors use propensity score matching to evaluate the effectiveness of CONAFE, a compensatory education program in Mexico, in improving student test scores and lowering repetition and failure rates. They find that CONAFE is most effective in improving primary school math learning and secondary school Spanish learning. Secondary education delivered by way of television to remote communities and bilingual education for indigenous students are both shown to improve student achievement. CONAFE also lowers primary school repetition and failure rates. The authors conclude that this compensatory education program can effectively improve short-term learning results for disadvantaged students, but that improvement varies by the subject of instruction and the demographics of students taught.Primary Education,Gender and Education,Health Monitoring&Evaluation,Teaching and Learning,Public Health Promotion,Teaching and Learning,Gender and Education,Primary Education,Health Monitoring&Evaluation,Girls Education

Globalization and the Role of Public Transfers in Redistributing Income in Latin America and the Caribbean

This paper focuses on measuring the extent to which publicly subsidized transfers in Latin America and the Caribbean redistribute income. The redi$social protection, insurance, redistribution, targeting, poverty, inequality, welfare

US Water Pollution Regulation over the Last Half Century: Burning Waters to Crystal Springs?

In the half century since the founding of the U.S. Environmental Protection Agency, public and private U.S. sources have spent nearly $5 trillion ($2017) to provide clean rivers, lakes, and drinking water, or annual spending of 0.8 percent of U.S. GDP in most years. Yet over half of rivers and substantial shares of drinking water systems violate standards, and polls for decades have listed water pollution as Americans’ number one environmental concern. We assess the history, effectiveness, and efficiency of the Clean Water Act and Safe Drinking Water Act, and obtain four main conclusions. First, water pollution has fallen since these laws, in part due to their interventions. Second, investments made under these laws could be more cost-effective. Third, most recent studies estimate benefits of cleaning up pollution in rivers and lakes which are less than their costs, though these studies may under-count several potentially important types of benefits. Analysis finds more positive net benefits of drinking water quality investments. Fourth, economic research and teaching on water pollution is relatively uncommon, as measured by samples of publications, conference presentations, and textbooks