This research explores the idea that weather conditions and driverand vehiclepopulation characteristics affect a homogenous roadway segment’s flow-versus-density relationship. Third-order-polynomial regressions of flow on powers of density interacted with a variety of explanatory variables suggest that driver, vehicle, and environmental attributes significantly influence the flow-density relati...

This paper empirically investigates the impact of globalization on the business cycle comovement of individual US states with the rest of the national economy and with the rest of world. Regressions with panel data over the period 1990-2005 provide strong evidence in support of the conventional wisdom that rising global integration over time, through either trade or foreign direct investment fl...

Understanding the mutual relationships between information flows and social activity in society today is one of the cornerstones of the social sciences. In financial economics, the key issue in this regard is understanding and quantifying how news of all possible types (geopolitical, environmental, social, financial, economic, etc.) affects trading and the pricing of firms in organized stock ma...

We determine spectrum and eigenspaces of some families of SpinC Dirac operators over the flat 3-torus. Our method relies on projections onto appropriate 2-tori on which we use complex geometry. Furthermore we investigate those families by means of spectral sections (in the sense of Melrose/Piazza). Our aim is to give a hands-on approach to this concept. First we calculate the relevant indices w...

We examine job creation and destruction in Eastern and Western Germany for the period of 1999 to 2004, using a large dataset, which enables us to capture clearly entries and exits. There are pronounced differences between the two parts of Germany in terms of magnitude and composition of gross job flows. Considering interaction effects between all variables, weighted regressions show that job cr...

The matrix affine Poisson space (Mm,n, πm,n) is the space of complex rectangular matrices equipped with a canonical quadratic Poisson structure which in the square case m = n reduces to the standard Poisson structure on GLn(C). We prove that the Hamiltonian flows of all minors are complete. As a corollary we obtain that all Kogan–Zelevinsky integrable systems on Mn,n are complete and thus induc...

This paper empirically evaluates the relative importance of embodied versus disembodied idea flows in explaining income gaps and idea gaps. Trade is used as a measure of embodied idea flows and telephone call traffic a measure of disembodied flows. Since both trade and telephone traffic may be endogenous, this paper uses the geographic, linguistic, and colonial components of trade and telephone...

We use MD&A disclosures to predict current-year firm-level accruals using support-vector regressions. We call these predictions MD&A accruals. Our aim is to measure the explanatory power of MD&A disclosures for liquidity and critical accounting choices. We find that MD&A accruals explain a statistically and economically significant portion of firm-level accruals and identify more persistent acc...

According to the classical Ricardian theory of comparative advantage, relative labor productivities determine trade patterns. The Ricardian model plays an important pedagogical role in international economics, but has received scant empirical attention since the 1960s. This paper assesses the contemporary relevance of the Ricardian model for US trade. Cross-section seemingly unrelated regressio...

The adoption of intranets and extranets involve major organisational innovation. Intranets alter the flows and content of internal communications, while extranets alter communications between the firm and its clients and suppliers. The paper identifies a number of potential factors that may affect adoption. These include internal and external business drivers, the role of the CEO/owner, firms’ ...