In jeder arbeitsteiligen Gesellschaft ist Wirtschaftspolitik erforderlich. Im Rahmen der Wirtschaftspolitik wird versucht, ein komplexes Geflecht von Zielen zu erreichen. Es kann auch vorkommen, dass mit dem Erreichen eines Ziels ein anderes geschwächt wird. Dies ist Gegenstand des vorliegenden Beitrags. Konkret geht es um das Ziel Verbesserung der Wirtschaftsstruktur und das Umweltziel. Das Strukturziel wird in der Bundesrepublik Deutschland unter anderem über die Investitionszuschüsse im Rahmen der Gemeinschaftsaufgabe ‚Verbesserung der regionalen Wirtschaftsstruktur‘ verfolgt, die über die Länder ausgereicht werden. Einige Länder sind dazu übergegangen, die Gewährung von Investitionszuschüssen an Sekundärziele, zum Beispiel auch den Umweltschutz, zu knüpfen. Der vorliegende Beitrag beschreibt einen aktuellen Fall aus dem politischen Diskussionsprozess, in dem die Höhe des Fördersatzes an die Einführung von so genannten Umweltmanagementsystemen gebunden wird. Der Beitrag zeigt, dass unter bestimmten Konstellationen die Investitionstätigkeit gebremst wird und gleichzeitig Umweltmanagementsysteme nicht eingeführt werden. Damit hätte man beide Ziele nicht erreicht. Der bessere Weg bestünde in der direkten Unterstützung von Unternehmen, bei denen ein Umweltmanagementsystem sinnvoll ist, wie es bereits durch Programme auf Landesebene praktiziert wird.

This paper analyzes the importance of teacher quality at the college level. Instructors are matched to objective and subjective characteristics of teacher quality to estimate the impact of rank, salary, and perceived effectiveness on student performance and subject interest. Student and course fixed effects, time of day and week controls, and students' lack of knowledge about first-year instructors help minimize selection biases. Subjective teacher evaluations perform well in measuring instructor influences on students, while objective characteristics such as rank and salary do not. Overall, the importance of college instructor differences is small, but important outliers exist.

We seek to understand the relationship between network change determinants, network change processes at the micro level and structural consequences at the overall network level. Our conceptual framework considers three groups of determinants – organizational, relational and contextual. Selected factors within these groups are assumed to cause network change processes at the micro level – tie formations and tie terminations – and to shape the structural network configuration at the overall network level. We apply a unique longitudinal event history dataset based on the full population of 233 German laser source manufacturers and 570 publicly-funded cooperation projects to answer the following research question: What kind of exogenous or endogenous determinants affect a firm’s propensity and timing to cooperate and enter the network? Estimation results from a non-parametric event history model indicate that young micro firms enter the network later than small-sized and large firms. An in-depth analysis of the size effects for medium-sized firms provides some unexpected yet quite interesting findings. The choice of cooperation type makes no significant difference for the firms’ timing to enter the network. Finally, the analysis of contextual determinants shows that cluster membership can, but do not necessarily, affect a firm’s timing to cooperate.

This article analyses how regional employment growth in Germany is affected by related variety, unrelated variety and the functions a region performs in the production process. Following the related variety literature, we argue that regions benefit from the existence of related activities that facilitate economic development. However, we argue that the sole reliance of related variety on standard industrial classifications remains debatable. Hence, we offer estimations for establishing that conceptual progress can indeed be made when a focus for analysis goes beyond solely considering industries. We develop an industry-function based approach of related and unrelated variety. Our findings suggest that related variety only in combination with a high functional specialization of the region facilitates regional growth in Germany. Additionally, also unrelated variety per se fails to wield influences affecting development of regions. It is rather unrelated, but functionally proximate variety in the groups “White Collar” and “Blue Collar Workers” positively affects regional employment growth.