MSI & ECOOM
3000 Leuven, BELGIUM
NBER Working Papers and Publications
|April 2016||Bias against Novelty in Science: A Cautionary Tale for Users of Bibliometric Indicators|
with Reinhilde Veugelers, Paula Stephan: w22180
Research which explores unchartered waters has a high potential for major impact but also carries a higher uncertainty of having impact. Such explorative research is often described as taking a novel approach. This study examines the complex relationship between pursuing a novel approach and impact. Viewing scientific research as a combinatorial process, we measure novelty in science by examining whether a published paper makes first time ever combinations of referenced journals, taking into account the difficulty of making such combinations. We apply this newly developed measure of novelty to all Web of Science research articles published in 2001 across all scientific disciplines. We find that highly novel papers, defined to be those that make more (distant) new combinations, deliver...
|December 2011||Do Mood Swings Drive Business Cycles and is it Rational?|
with Paul Beaudry, Deokwoo Nam: w17651
This paper provides new evidence in support of the idea that bouts of optimism and pessimism drive much of US business cycles. In particular, we begin by using sign-restriction based identification schemes to isolate innovations in optimism or pessimism and we document the extent to which such episodes explain macroeconomic fluctuations. We then examine the link between these identified mood shocks and subsequent developments in fundamentals using alternative identification schemes (i.e., variants of the maximum forecast error variance approach). We find that there is a very close link between the two, suggesting that agents' feelings of optimism and pessimism are at least partially rational as total factor productivity (TFP) is observed to rise 8-10 quarters after an initial bout of optim...
|February 2008||International Trade in Durable Goods: Understanding Volatility, Cyclicality, and Elasticities|
with Charles Engel: w13814
Data for OECD countries document: 1. imports and exports are about three times as volatile as GDP; 2. imports and exports are pro-cyclical, and positively correlated with each other; 3. net exports are counter-cyclical. Standard models fail to replicate the behavior of imports and exports, though they can match net exports relatively well. Inspired by the fact that a large fraction of international trade is in durable goods, we propose a two-country two-sector model, in which durable goods are traded across countries. Our model can match the business cycle statistics on the volatility and comovement of the imports and exports relatively well. In addition, the model with trade in durables helps to understand the empirical regularity noted in the trade literature: home and foreign goods are ...
Published: Engel, Charles & Wang, Jian, 2011. "International trade in durable goods: Understanding volatility, cyclicality, and elasticities," Journal of International Economics, Elsevier, vol. 83(1), pages 37-52, January. citation courtesy of