Abstract
This paper revisits the catching-up hypothesis among the 29 transition countries using the time series approach to investigate income convergence. In this study, we propose a model which specifies a trend function incorporating both sharp and smooth breaks using dummy variables and Fourier functions, respectively. Our empirical results indicate that two convergence clubs are forming among the transition countries and one club is among the rich and the other club is among the poor countries, where most middle income countries will disappear and move into one of the two clubs. Also, our results indicate that the 1980s was an ominous decade for growth in the transition countries with income in most diverging from the USA. With recovery in the 1990s, we find that in the 2000s income per capita in most of these countries was catching up toward the USA.
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Notes
. Whereas most of the transition countries were not official countries prior to the break-up of the former Soviet Union and the former Yugoslavia. Hence there is projected data for the countries in the database. The projections are informed primarily by analysis from Oxford Economic Forecasts, IHS Economics and Country Risk, the IMF World Economic Outlook, and other country-specific sources. Long-term projections are made under the assumption that global policies are largely held constant. Therefore, projections generally imply a smooth future path.
“β-convergence” occurs when there is a negative relationship between the average growth rate of the relative income and its initial log per-capita level. On the other hand, “sigma convergence” is accepted when the standard deviation of the relative income decreases over time (Barro and Sala-i-Martin 1992).
Whereas this paper is concentrated on time series approach of convergence hypothesis and also in order to save the space, we do not explain the technical debates on quantile regression and non-parametric regression. For quantile regression see Koenker (2000) and Sofi and Durai (2016) and for non-parametric regression see Laurini et al. (2005).
An important point to use Bai and Perron (BP) procedure to identify breaks is that the BP procedure is valid only if the time series is stationary. Given that we do not know before performing the stationary test whether the series is stationary or non-stationary, the CBL stationary test may prepare unreliable results. Much thanks from an anonymous referee for this note.
As see in Eqs. (10) and (11), the conventional KPSS test is a one variety of Becker et al. (2006) when trigonometric component is ignored. As noted by Becker et al. (2006, p. 391) “the usual KPSS-type stationary tests will diverge when nonlinear trends are ignored. This leads to over-rejections of the true stationary null hypothesis in favour of the false unit-root hypothesis.” In order to test for presence of nonlinear terms, Becker et al (2006) offered a F(k) test. As noted by Becker et al (2006), the presence of the nuisance parameter causes the distribution of F(k) to be non-standard. Hence, in this paper we calculate the critical values for any series. For this end, first we generate 20,000 random series using the Gauss (version 10.0.0) RNDN procedure and under the null of linearity. Then using optimum frequency of any actual series, we calculated the F statistic for any of 20,000 pseudo series. In final step we obtained the critical values from sorted vector of pseudo F statistic.
In order to determine the optimum frequency, we follow Becker et al. (2006) and first determine the maximum frequency equal to 5 and then calculate the sum of squared residuals (SSR hereafter) for any frequency. The optimum frequency is the minimum of the SSR.
Whereas BP procedure needs to the series be stationary, hence if the null of stationary is rejected for a series, we cannot estimate Eq. (17) using our methodology.
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Ranjbar, O., Chang, T., Lee, CC. et al. Catching-up process in the transition countries. Econ Change Restruct 51, 249–278 (2018). https://doi.org/10.1007/s10644-017-9214-5
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DOI: https://doi.org/10.1007/s10644-017-9214-5