We study the importance of teacher subject knowledge for student performance in Sub-Saharan Africa using unique international assessment data for sixth-grade students and their teachers. To circumvent bias due to unobserved student heterogeneity, we exploit variation within students across math and reading. Teacher subject knowledge has a modest impact on student performance. Exploiting vast cross-country differences in economic development, we find that teacher knowledge is effective only in more developed African countries. Results are robust to adding teacher fixed effects and accounting for potential sorting based on subject-specific factors.

This paper examines the benefits to venture capital firms of their officers holding directorships in mature public companies in terms of fundraising and investment performance. Our empirical results show that venture capital firms raise more funds, set higher fund-raising targets, and are more likely to successfully exit their investments post-appointment of their officers to boards of directors of S&P 1500 companies. Directorship status in mature public firms provides venture capital firms with enhanced networks, visibility, and credibility, all of which facilitate their fundraising activities. In addition, the knowledge, expertise, and experience acquired through holding directorships in mature public firms are beneficial for their portfolio companies, as measured by the likelihood of successful exits.

R&D collaborations and the role of proximity. Regional Studies. This paper explores the impact of proximity measures on knowledge exchange measured by granted research and development (R&D) collaboration projects in German NUTS-3 regions. The results are obtained from a spatial interaction model including eigenvector spatial filters. Not only geographical but also other forms of proximity (technological, organizational and institutional) have a significant influence on the emergence of collaborations. Furthermore, the results suggest interdependences between proximity measures. Nevertheless, the analysis does not show that other forms of proximity may compensate for missing geographical proximity. The results indicate that (subsidized) collaborative innovation activities tend to cluster.

Economic growth is the core topic for both economic researchers and economic policy makers. Thereby two questions are regarded as central: What are the factors that establish high growth? And how can sustainable growth, i.e. the avoidance of severe fluctuations, be achieved? Indeed, basically all areas of economics, from finance to labor economics, from development economics to industrial organization, from competition economics to environmental economics aim to achieve knowledge that directly (or indirectly) helps to understand and create growth that is both sufficient and sustainable.

Start-ups and other entrepreneurial ventures make a significant contribution to the US economy, particularly in the tech sector, where they comprise some of the largest and most influential companies. Yet for every startup that becomes a high-profile, high-growth company like Apple, Facebook, Microsoft, and Google, many more fail. This enormous heterogeneity poses conceptual and measurement challenges for economists concerned with understanding how new businesses affect economic growth.

Although the phase of euphoria seems to be over, policy makers and regional agencies have maintained their interest in cluster policy. Modern cluster theory provides reasons for positive external effects that may accrue from interaction in a group of proximate enterprises operating in common and related fields. Although there has been some progress in locating clusters, in most cases only limited knowledge on the geographical extent of regional clusters has been established. In the present article, we present a hybrid approach to cluster identification. Dominant buyer–supplier relationships are derived by qualitative input–output analysis from national input–output tables, and potential regional clusters are identified by spatial scanning. This procedure is employed to identify clusters of German research and development-intensive industries. A sensitivity analysis reveals good robustness properties of the hybrid approach with respect to variations in the quantitative cluster composition.

Subsidies for research and development (R&D) are an important tool of public R&D policy, which motivates extensive scientific analyses and evaluations. This article adds to this literature by arguing that the effects of R&D subsidies go beyond the extension of organizations’ monetary resources invested into R&D. It is argued that collaboration induced by subsidized joint R&D projects yield significant effects that are missed in traditional analyses. An empirical study on the level of German labor market regions substantiates this claim, showing that collaborative R&D subsidies impact regions’ innovation growth when providing access to related variety and embedding regions into central positions in cross-regional knowledge networks.

In this paper, we study the relationship between financial literacy and self-employment. We use established financial knowledge-based questions to measure financial literacy levels. The analysis shows a highly significant correlation between selfemployment and financial literacy scores. To investigate the impact of financial literacy on being self-employed, we apply instrumental variable techniques based on information on economic education before entering the labour market and education of parents. Our results reveal that financial literacy positively affects the probability of being self-employed. As financial literacy is acquirable, findings suggest that entrepreneurial activities may be raised via enhancing financial knowledge.

Übergeordnetes Ziel der hier vorgestellten Routinen ist die Abbildung von Kooperationsbeziehungen von Unternehmen, Universitäten, außeruniversitären Forschungseinrichtung sowie sonstiger Institutionen auf drei Ebenen von Innovationstätigkeit (Verbundprojekte; Publikationen; Patente). Dazu werden a) die drei innovationsbezogenen Datenbanken (Förderkatalog; Web of Knowledge; DPMA Patente) vereinheitlicht und zusammengeführt sowie b) diese kombinierten Datenbestände mittels Record-Linkage-Techniken mit den Daten aus den Institutionendatensätzen Amadeus und Research Explorer verknüpft. Die Zusammenführung erstreckt sich für dieses Projekt auf die sechs Fallregionen, die in RegDemo vorgesehen sind. Die Abgrenzung erfolgt anhand von Raumordnungsregionen: 501 - Aachen; 513 - Siegen; 602 - Nordhessen (= „Kassel“); 1302 – Mittleres Mecklenburg/Rostock (= „Rostock“); 1401 - Oberes Elbtal/Osterzgebirge (= „Dresden“); 1504 - Magdeburg.

Technological complementarity is argued to be a crucial element for effective R&D collaboration. The real structure is, however, still largely unknown. Based on the argument that organizations’ knowledge resources must fit for enabling collective learning and innovation, we use the co-occurrence of firms in collaborative R&D projects in Germany to assess inter-sectoral technological complementarity between 129 sectors. The results are mapped as complementarity space for the Germany economy. The space and its dynamics from 1990 to 2011 are analyzed by means of social network analysis. The results illustrate sectors being complements both from a dyadic and portfolio/network perspective. This latter is important, as complementarities may only become fully effective when integrated in a complete set of different knowledge resources from multiple sectors. The dynamic perspective moreover reveals the shifting demand for knowledge resources among sectors at different time periods.