We analyze the impact of obsolescence of economic inventions by incorporating maintenance costsin the endogenous growth model of expanding product varieties. This contrasts with the existingliterature, which ignores maintenance costs and uses the model of quality improvements todescribe...

Which signals are important in gaining attention in science? For a group of 1,371 scientific articles published in 17 demography journals in the years 1990-1992 we track their influence and discern which signals are important in receiving citations. Three types of signals are examined: the...

This discussion paper resulted in an article in the 'American Economic Review' (2006). Volume 96, issue 2, pages 270-274.<P> Empirical studies of labor markets show that social contacts are an important source of job-related information [Ioannides and Loury (2004)]. At the same time, wage...</p>

We apply a recently proposed method to disentangle unobserved heterogeneity from risk in returns to education. We replicate the original study on US men and extend to US women, UK men and German men. Most original results are not robust. A college education cannot universally be considered an...

This discussion paper led to a publication in (W.D. Nelson (Ed.)), <I>Advances in Business and Management</I> (pp. 1-32), New York: Nova Publishers, 2011. In this era of globalization we see an increase in specialization: the production chain issplit up in more and more parts and the production of...</i>

A major question in the globalization debate is whether outsourcing and offshoring activities are beneficial to the home country. This paper investigates the effects on productivity and trade from the perspective of transaction costs, using a recent theory on trade in tasks. A production...

In this paper we explore linkages between financial services tradeand growth. We offer aformalization of the argument that trade, through the fostering offinancial market integration,may yield important long-run effects related to increasedcompetition. The relationshipsformalized here link...

We explore dynamic linkages between financial/banking sector openness, financial sector competition, and growth. We first develop an analytical model, highlighting links between long-run economic performance and services trade, through scale economies and market and cost structures in the...

This paper explores the link between trade structure, trade specialization and per capita incomegrowth. It is argued that industrial upgrading in export specialization patterns has a positive long-rungrowth effect, while the effect of structural change in industrial import patterns is in...

This discussion paper resulted in a publication in <I>Structural Change and Economic Dynamics</I>, 2013, 24, 141-156.<P> We address the notion of dynamic, endogenous diversity and its role in theories of investment and technological innovation. We develop a formal model of an innovation arising from the...</p></i>