NBER Publications by Ernst Schaumburg

We propose two new jump-robust estimators of integrated variance based on high-frequency return observations. These MinRV and MedRV estimators provide an attractive alternative to the prevailing bipower and multipower variation measures. Specifically, the MedRV estimator has better theoretical efficiency properties than the tripower variation measure and displays better finite-sample robustness to both jumps and the occurrence of "zero'' returns in the sample. Unlike the bipower variation measure, the new estimators allow for the development of an asymptotic limit theory in the presence of jumps. Finally, they retain the local nature associated with the low order multipower variation measures. This proves essential for alleviating finite sample biases arising from the pronounced intraday v...

Globalization has brought a sharp increase in the developed world’s labor supply. Labor in developing countries – countries with vast pools of underemployed people – can now more easily augment labor in the developed world, without having to relocate, in ways not thought possible only a few decades ago. We argue that the large increase in the developed world’s labor supply, triggered by geo-political events and technological innovations, is the major underlying cause of the global macro economic imbalances that led to the great recession. The inability of existing institutions in the US and the rest of the world to cope with this shock set the stage for the great recession: The inability of emerging economies to absorb savings through domestic investment and consumption due to inadequate n...

Disturbances affecting agents intertemporal substitution are the key driving force of macroeconomic fluctuations. We reach this conclusion exploiting the bond pricing implications of an estimated general equilibrium model of the U.S. business cycle with a rich set of real and nominal frictions.