Narrow search
Showing 1 - 10 of 106
Cover Image
The effects of variance breaks on homogenous panel unit root tests
Herwartz, Helmut; Siedenburg, Florian - 2009
Noting that many economic variables display occasional shifts in their second order moments, we investigate the performance of homogenous panel unit root tests in the presence of permanent volatility shifts. It is shown that in this case, panel unit root tests derived under time invariant...
Persistent link: https://www.econbiz.de/10003887238
Cover Image
A new approach to bootstrap inference in functional coefficient models
Herwartz, Helmut (contributor); Fang, Xu (contributor) - 2007
We introduce a new, factor based bootstrap approach which is robust under heteroskedastic error terms for inference in functional coefficient models. Modeling the functional coefficient parametrically, the bootstrap approximation of an F statistic is shown to hold asymptotically. In simulation...
Persistent link: https://www.econbiz.de/10003477963
Cover Image
State dependence in the finance-growth nexus : a functional coefficient approach
Herwartz, Helmut; Yabibal Mulualem Walle - 2013
Noting that "one size does not fit all" in the case of the finance-growth (FG) nexus, a growing body of literature has recently focused on uncovering economic conditions under which financial development could be beneficial (detrimental) to economic development. We look into these conditions by...
Persistent link: https://www.econbiz.de/10009752169
Cover Image
An empirical study on causes and consequences of inflation and inflation uncertainty
Hartmann, Matthias - 2012
Empirical study of causality between inflation, inflation uncertainty and other macroeconomicy quantities. Additionally, the issue of how to measure the unobservable inflation uncertainty is addressed.
Persistent link: https://www.econbiz.de/10009671994
Cover Image
A functional coefficient model view of the Feldstein-Horioka puzzle
Herwartz, Helmut (contributor); Fang, Xu (contributor) - 2007
What does the saving-investment (SI) relation really measure and how should the (SI) relation be measured? These are two of the most discussed issues triggered by the so called Feldstein-Horioka puzzle. Based on panel data we introduce a new variant of functional coefficient models that allow to...
Persistent link: https://www.econbiz.de/10003477959
Cover Image
Long-run links among money, prices, and output : world-wide evidence
Herwartz, Helmut; Reimers, Hans-Eggert - 2001
analyse this topic by means of a P-star model. Based on the quantity theory of money, this approach explains inflation via a …. Moreover, parameter restrictions for the long-run relationships implied by the monetary theory are tested. Country specific P … Preisniveau und dem realen Output testet. Weiterhin werden die Parameterrestriktionen, die sich durch die monet¨are Theorie …
Persistent link: https://www.econbiz.de/10011419407
Cover Image
Point, interval and density forecasts of exchange rates with time-varying parameter models
Abbate, Angela; Marcellino, Massimiliano - 2016
We explore whether modelling parameter time variation improves the point, interval and density forecasts of nine major exchange rates vis-a-vis the US dollar over the period 1976-2015. We find that modelling parameter time variation is needed for an accurate calibration of forecast confidence...
Persistent link: https://www.econbiz.de/10011489395
Cover Image
Modelling the Fisher hypothesis: World wide evidence
Herwartz, Helmut (contributor);  … - 2006
In this paper we follow an empirical approach to examine the implications of the Fisher hypothesis, namely cointegration linking interest rates and inflation, and stationarity of the real interest rate implying in turn homogeneity of the potential equilibrium relation. The considered sample is...
Persistent link: https://www.econbiz.de/10003296858
Cover Image
Skill policies for Scotland
Heckman, James J. (contributor);  … - 2004
This paper argues that skill formation is a life-cycle process and develops the implications of this insight for Scottish social policy. Families are major producers of skills, and a successful policy needs to promote effective families and to supplement failing ones. We present evidence that...
Persistent link: https://www.econbiz.de/10002540578
Cover Image
Skill policies for Scotland
Heckman, James J. (contributor);  … - 2005
This paper argues that skill formation is a life-cycle process and develops the implications of this insight for Scottish social policy. Families are major producers of skills, and a successful policy needs to promote effective families and to supplement failing ones. Targeted early...
Persistent link: https://www.econbiz.de/10002576887