Discussion Paper 2019/4 is now available: El-Shagi, M. / Jiang, L.: Efficient Dynamic Yield Curve Estimation in Emerging Financial Markets

Abstract:

The current state-of-the-art estimation of yield curves relies on the dynamic state space version of the Nelson and Siegel (1987) model proposed in the seminal paper by Diebold et al. (2006). However, things become difficult when applying their approach to emerging economies with less frequently bond issuance and more sparse maturity available. Therefore, the traditional state space representation, which requires dense and fixed grids of maturities, may not be possible. One remedy is to use the traditional Nelson and Siegel (1987) OLS estimation instead, though it sacrifices efficiency by ignoring the time dimension. We propose a simple augmentation of the Diebold et al. (2006) framework, which is more efficient than OLS estimation as it allows exploiting information from all available bonds and the time dependency of yields. We demonstrate the efficiency gains generated by our method in five case studies for major emerging economies including four of the BRICS.

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Discussion Paper 2019/3 is now available: El-Shagi, M. / Sawyer, W.C. / Tochkov, K.: The Income Elasticity of Import Demand - A Meta Survey

Abstract:

Import demand has been a major research topic in international economics for the past 80 years because of its importance for analyzing trade and evaluating trade policies. The goal of this paper is to survey the literature and conduct a meta-analysis of empirical studies on import demand with the intention of clarifying the effect of economic development on income elasticity. In particular, we test the hypothesis that higher income levels are associated with a more elastic import demand. We apply a combination of parametric and non-parametric methods on estimates from a sample of 152 papers published over the period 1975-2014 and find that this relationship is signicant and robust. Specifically, kernel densities of income elasticity estimates for high-income countries in North America and Europe are shown to exceed those for poorer parts of the world. The results from quartile regressions confirm this pattern and establish its robustness when controlling for the effect of model specifications.

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April 24th, 2019

Discussion Paper 2019/2 is now available: El-Shagi, M. / Muhammad, B.: Institutional Similarity and Bilateral FDI

Abstract:

In this paper we assess the effect of institutional similarity on foreign direct investment. In a large panel of bilateral FDI stocks that covers roughly 190 countries both as host and source country of FDI we demonstrate that it is not similarity in general, but similarity with respect to government involvement in markets and with respect to corruption that matters. Our finding is robust to a large set of different panel estimators and specifications of the gravity model that is underlying our estimation.

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April 12th, 2019

Discussion Paper 2019/1 is now available: Marsiglio, S. / Masoudi, N.: Transboundary Pollution Control and Competitiveness Concerns in a Two-Country Differential Game

Abstract:

We analyze a transboundary pollution control problem in a heterogeneous two-country differential game in which each country’s regulator cares for the implications of environmental policy on its compet-
itiveness. We characterize and compare the noncooperative and the cooperative solutions, showing that under both scenarios, the heterogeneous countries impose different tax rates despite such competitiveness
concerns. This may suggest that, while implementing some kind of mitigation policy is necessary to combat climate change, a universally homogeneous environmental tax may not be either desirable or optimal.

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