Einzelbesprechungen

Ohne Zusammenfassung     

Truly standard-essential patents? A semantics-based analysis

Standard-essential patents (SEPs) have become a key element of technical coordination via standard-setting organizations. Yet, in many cases, it remains unclear whether a declared SEP is truly standard-essential. To date, there is no automated procedure that allows for a scalable and objective assessment of SEP status. This paper introduces a semantics-based method for approximating the standard essentiality of patents. We provide details on the procedure that generates the measure of standard essentiality and present the results of several validation and robustness exercises. We illustrate the measure's usefulness in estimating the share of true SEPs in firm patent portfolios for several telecommunication standards.     

Does sports activity improve health? Representative evidence using local density of sports facilities as an instrument

Using representative and geocoded data from the Swiss Household Panel and the Swiss Business Census, we estimate the effect of sports activity on health. OLS models show that sports activity significantly decreases overweight, sleeping problems, headaches, back problems, and perceived health impediments in everyday activities and significantly increases health satisfaction. Because sports activity is likely to be misreported and correlated with unobserved determinants of health, we use the number of sports facilities within 6 miles of the individual’s residence as an instrument for sports activity. Although the instrument is powerful in explaining sports activity, the second-stage effects on health are mostly statistically insignificant due to the high SEs of the IV estimates.     

Frisch and Tinbergen on economic planning

The Frisch-Tinbergen model of central economic planning represents the first important non-Soviet planning model. This constrained optimization model makes the central planner a staff adviser to the Premier. The central planner explores the Premier's preference ordering and recommends instruments that maximize the Premier's utility, given the constraints within an econometric model. This model assumes Premiers have no preference over instruments or models and that planning agencies have neither internal structure nor operating responsibilities. The paper explores the consequences of removing such limiting assumptions, utilizing the results of more recent contributions to the theory of.-economic systems.     

The innovator's media dilemma: How journalists cover incumbents' adoption of discontinuous technologies

We offer a new vantage to the literature on the role of infomediaries in incumbent firms' struggles to adopt discontinuous technologies: the perspective of news media. Specifically, we combine the discontinuous technology literature with studies on news media journalism to theorize that journalists cover an incumbent's new product introductions differently, depending on whether a given new product builds on a discontinuous technology or on the respective established, continuous technology. First, discontinuous-technology-based product introductions receive a greater volume of coverage than continuous-technology-based product introductions because journalists prefer covering issues that are novel, deviate from the conventional, and potentially strongly impact society. Second, the coverage of discontinuous-technology-based product introductions is more divergent in tenor than the coverage of continuous-technology-based product introductions, as journalists seek to present opposing and thus more engaging opinions. Our analyses of unique archival data from two samples of product introductions in the automotive and photography industries, respectively, support our hypotheses. We also find intriguing indications that news media coverage of new products introductions using hybrid technologies is significantly context-dependent. Overall, our study points to so-far undescribed, media-related dilemmas for incumbent firms that aim to adopt discontinuous technologies.     

Consumer expectations and short-horizon return predictability

Lettau and Ludvigson [Lettau, M., Ludvigson, S, 2001. Consumption, aggregate wealth and expected stock returns. Journal of Finance 56, 815–849] argue that fluctuations from the equilibrium ratio of consumption to wealth (cây) reflect changing expectations of asset returns and document significant short-horizon predictability based on cây. This paper further explores the role of consumer expectations in modeling time variation of expected equity returns by considering two measures of consumer expectations: (i) consumer behavior as reflected in cây, and (ii) a more-direct measure of expectations captured by the Index of Consumer Sentiment (ICS). We report strong regression-based evidence of return predictability based on cây, which remains evident even after accounting for various sources of estimation risk. However, the regression-based evidence of predictability does not necessarily imply that shifts in aggregate consumption and the components of aggregate wealth give rise to economically significant investment signals. The survey-based measure of expectations (ICS) is shown to complement the behavioral measure (cây) but has no apparent stand-alone predictive value in forecasting equity returns.     

PKW-Maut: Für eine verbrauchs-, entfernungs- und zeitabhängige Gebühr

Zur Zeit wird das Stra?ennetz in Deutschland aus den Haushaltsmitteln der ?ffentlichen Kassen finanziert. In den letzten Monaten wurde auf Ministerebene wiederholt die Einführung einer entfernungsunabh?ngigen PKW-Vignette diskutiert. In welcher Form sollten die optimale Bereitstellung und die Finanzierung des Stra?ennetzes aus finanzwissenschaftlicher Perspektive realisiert werden? Dr. Adam Jakubowski, 35, ist Head of Research bei sc-consult GmbH in Münster; Dr. Christian Lorenz, 34, ist Consultant am Centre for International Migration and Development in Frankfurt.     

Cross-border banking in the EU since the crisis: What is driving the great retrenchment?

Review of World Economics - This paper examines the drivers of the retrenchment in cross-border banking in the European Union (EU) since the global financial crisis, which stands out in...     

New situations facing the NICs in East Asia

The newly industrialising countries (NICs) in the East Asian region are beginning to be faced with serious problems: problems involved not only in moving from an easy phase of import substitution to a more difficult second stage, but also in progressing from the first to the second more demanding phase of export orientation. Professor Lorenz analyses this new situation.