In a nonlinear framework, temporal dependence of time series is sensitive to transformations. The aim of this paper is to examine in detail the relationships between various forms of persistence and nonlinear transformations of stationary and nonstationary processes. We introduce the concept of...

Efficiency in financial markets is tested by applying variance ratio (VR)tests, but unit root tests are also used by many, sometimes in addition to the VR tests. There is a lack of clarity in the literature about the implication of these test results when they seem to disagree. We distinguish...

In this study, the random walk hypothesis for emerging markets has been tested. First of all,Harvey et. al. (2008) linearity test was made in this study where different time intervals were handled. ADF (1979) unit root test was made to the linear series in order to test the efficiency of the...

Traditional econometric models, such as the ordinary least square method, are built on the assumption of constant variance. Financial time series, unlike other economic series, usually exhibit a set of peculiar characteristics i.e. mean reversion, volatility clustering, fat tails and long...

We analyze the sustainability of public finances in the 16 states (Laender) of the Federal Republic of Germany using an unprecedentedly comprehensive fiscal dataset covering the period from 1950 to 2011 for West German Laender and from 1991 to 2011 for East German Laender. As we apply unit root...

We quantify the degree of persistence in unemployment rates of transition countries using a variety of methods benchmarked against the EU. In part of the paper, we work with the concept of linear "Hysteresis" as described by the presence of unit roots in unemployment. Since this is potentially a...

Tourism has a significant impact on economic growth as put forth by the tourism-led growth hypothesis. Turkey's earnings from tourism were 31.5 billion dollars in 2015 according to TURKSTAT. This implies that tourism is an important industry for Turkey and has a significant impact on economy....

The major objective of this paper is to demonstrate, theoretically and empirically, the test of a single structural break/change. Failure to address a structural break can lead to forecasting errors and the general unreliability of a model. Three approaches of testing for structural change are...