The Size of the Shadow Economies of 145 Countries all over the World: First Results over the Period 1999 to 2003 Using the DYMIMIC approach, estimates of the shadow economy in 145 developing, transition, developed OECD countries, South Pacific islands and still communist countries are presented. The average size of the shadow economy (in percent of official GDP) over 2002/2003 in developing cou...

Many experts encourage homeowners to improve their houses to better survive natural catastrophes and reduce overall societal costs. However, we find these encouragements are not necessarily financially sound for the homeowner at risk of hurricane wind damage. We find that subsidized insurance reduces the incentive for a risk-neutral homeowner to purchase structural mitigation, as mitigation doe...

This paper studies a model of product variety with flexible manufacturers when, contrary to prior work, atomistic entry occurs prior to horizontal integration. In this model, more lax antitrust laws that allow for fewer and more concentrated merged firms lead to a greater extent of excess entry. Optimal policy permits no horizontal mergers when demand is perfectly inelastic, but may permit some...

Monthly seasonally unadjusted data can exhibit roots with possibly fractional orders of integration, corresponding to the monthly but also to the quarterly and to the long-run or trending components of the series. In this paper we use a procedure which is suitable to test simultaneously for the order of integration of each of these components and apply it to several US monetary aggregates. JEL ...

This articles investigates the recent trends in co-authorship in economics. Using data from more than 700.000 journal articles we show that the average number of authors per has increased over the last years. This process is likely to be continued in the future. In a regression analysis we present evidence how the authorship of papers is related to the number of citations, the JEL classificatio...

The SiO2 supported cobalt-iron nano catalysts were prepared by the sol-gel method. This research investigated the effects of (Co/Fe) wt.%, different Co/Fe ratio at different temperature and loading of KCl wt.% for Fisher-Tropsch synthesis (FTS). The results were showed that the catalyst containing 50 wt.% (Co/Fe)/SiO2 (Co/Fe ratio is 70/30) which promoted with 0.6 wt.% KCl is an optimal nano ca...

Economic Integration, Market Power and Technological Change We examine a common market which expands by integrating new regions. Capitalists are strategically interdependent through the goods market and they improve their productivity through R&D. Production and R&D employ unionized workers. The purpose of integration is to maximize a weighed average of workers’ and capitalists’ utilities. The ...

We propose a H2–CO kinetic model which incorporates the recent thermodynamic, kinetic, and species transport updates relevant to high-temperature H2 and CO oxidation. Attention has been placed on obtaining a comprehensive and kinetically accurate model able to predict a wide variety of H2–CO combustion data. The model was subject to systematic optimization and validation tests against reliable ...

This paper tests for the e¤ects of increased trade and …nancial integration on business cycle co-movement. Using both quantitative theory and a reduced form empirical approach motivated by the theory, I measure and explain the channels from bilateral trade integration, …nancial integration, and industrial specialization to cyclical co-movement. The model is also used to measure the causal chann...

transaction cost economics (tce), as a subset of new institutional economics (nie), is the combination of economics, organization and law. noble prize in 2009 was dedicated to oliver williamson who was the most popular face in the economics as tce main contributor. in tce, the main issues on the one hand is how institutions follow characteristics of transactions, on the other hand, the making o...