The State of Convergence in SADC
Tobias Knedlik, F. Povel
Monitoring Regional Integration in Southern Africa Yearbook, Vol. 7,
No. 7,
2007
Abstract
The Southern African Development Community (SADC) Treaty established an integration agenda for the grouping culminating in the introduction of a common currency by 2018. By determining the degree of macroeconomic convergence across countries it becomes possible to draw conclusions with respect to the feasibility of the envisaged integration agenda of a regional integration scheme. In order to test for convergence among southern African countries the panel unit root test proposed by Im, Pesaran, and Shin (2003) is conducted. The results of the convergence analysis suggest that countries converge towards South Africa.
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Panel Seasonal Unit Root Test: Further Simulation Results and An Application to Unemployment Data
Christian Dreger, Hans-Eggert Reimers
AStA - Advances in Statistical Analysis,
No. 3,
2005
Abstract
In this paper the seasonal unit root test of Hylleberg et al. (1990) is generalized to cover a heterogenous panel. The procedure follows the work of Im, Pesaran and Shin (2002). Test statistics are proposed and critical values are obtained by simulations. Moreover, the properties of the tests are analyzed for different deterministic and dynamic specifications. Evidence is presented that for a small time dimension the power is slow even for increasing cross section dimension. Therefore, it seems necessary to have a higher time dimension than cross section dimension. The new test is applied for unemployment behaviour in industrialized countries. In some cases seasonal unit roots are detected. However, the null hypotheses of panel seasonal unit roots are rejected. The null hypothesis of a unit root at the zero frequency is not rejected, thereby supporting the presence of hysteresis effects.
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Panel Seasonal Unit Root Test With An Application for Unemployment Data
Christian Dreger, Hans-Eggert Reimers
IWH Discussion Papers,
No. 191,
2004
Abstract
In this paper the seasonal unit root test of Hylleberg et al. (1990) is generalized to cover a heterogenous panel. The procedure follows the work of Im, Pesaran and Shin (2002). Test statistics are proposed and critical values are obtained by simulations. Moreover, the properties of the tests are analyzed for di®erent deterministic and dynamic specications. Evidence is presented that for a small time dimension the power is slow even for increasing cross section dimension. Therefore, it seems necessary to have a higher time dimension than cross section dimension. The new test is applied for unemployment behaviour in
industrialized countries. In some cases seasonal unit roots are detected. However, the null hypotheses of panel seasonal unit roots are rejected. The null hypothesis of a unit root at the zero frequency is not rejected, thereby supporting the presence of hysteresis effects.
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Is there a real world interest rate?
Christian Dreger, Christian Schumacher
Wirtschaft im Wandel,
No. 12,
2000
Abstract
The article examines the validity of real interest parity as a long run condition for the G7 countries. According to the hypothesis, differences of real interest rates are stationary. The hypothesis is supported by the means of panel unit root tests. Compared with standard unit root tests, these procedures rely on a broader long run information set and are better suited to detect a false null hypothesis.
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