Table 1 - uploaded by Hussein Al-Zyoud
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Stationarity of the series u

Stationarity of the series u

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The paper examines the long run movement between Canadian dollar and US dollar exchange rates. The study uses monthly data for the period 1995:01 to 2008:08 and employs the Engle-Granger cointegration test. Our analysis suggests that the absolute purchasing power parity (PPP) does not hold, indicating no long run relationship between the observed e...

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Context 1
... apply both ADF and PP test. Both tests consistently suggest that the variables under consideration are non-stationary in the level but stationary in the first difference (see Appendix Table 1). As the variables in the study are I(1) in level, we go for cointegration analysis. ...
Context 2
... stationarity result of the error series u is given below in Table 1. We applied DF, ADF and PP to check the stationary property in three possible cases, that is, under the assumption of no constant, only constant, and both constant and trend. ...
Context 3
... test the stationarity property of the variables under consideration for testing relative PPP. The result is given in Appendix Table A1. We find that all the variables are stationary at 1% level of significance. ...

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... The Purchasing Power Parity (PPP) is an ancient framework for analyzing long-term exchange rate movements, suggests that identical goods and services should cost the same in different countries (Al-Zyoud, 2015). Moreover, World Bank (2022) defined the PPP conversion factor as the number of units of a country's currency required to buy the same quantities of goods and services in the domestic market as a EGP would buy in the Egypt. ...
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... In the presence of structural breaks, PPP holds only for Bulgaria and Romania but does not hold for the other 6 transition countries. All results emphasised that there is weak evidence for the long-run PPP hypothesis in transition countries and the validity of PPP remains a controversial and unsettled issue Furthermore, Al-Zyoud (2015), examined the long run movement between the U.S. dollar and the Canadian dollar exchange rates using the Engle-Granger cointegration test. The analysis suggests that absolute PPP does not hold meaning that there is no long-run relationship between the Canadian Dollar and the U.S. dollar exchange rate. ...
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... In most economies where long-run PPP theory holds, it helps to determine the extent to which a currency is misaligned (over-or under-valued). Al-Zyoud (2015) argued that a decline (rise) in a country's domestic purchasing power will be connected to a proportionate depreciation (appreciation) of its currency on the foreign exchange market to reflect the PPP. This implies that where the foreign exchange market does not respond correspondingly to the decline (rise) in the purchasing power, then the exchange rate becomes inappropriate or misaligned. ...
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... Nevertheless, there are arguments that the efficacy of purchasing power parity is influenced by causes other than inflation, such as central banks' currency intervention, trade barriers, transaction rates and other variables (Al-Zyoud, 2015;Frankel, 1981;Rogoff, 1996). In addition, the link between inflation and currency depreciation appears to decline from year to year, according to Taylor and Taylor (2014), and researchers are thus starting to question the efficacy of the quantitative parity of buying power. ...
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... The unit root test does not support PPP due to non stationarity of exchange rate and no cointegration exists between price and exchange rate. Zyoud (2015) tested the PPP and found existence but weak level of PPP in short term due to slow movement as compared to change in value of currency. Bhatti (1996) and Shively (2001) supported a long term existence, relative price level move with the proportionate of nominal exchange rate risk and real exchange rate with its equilibrium level in long term. ...
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... Also, Hussein (2015) used the Engle and Granger cointegration test to empirically test for the validity of the PPP theory for the Canadian dollar and the US dollar exchange rates. The result of the study showed that there is no cointegration between actual exchange rates and PPP rate, suggesting that there is no long-run relationship between the Canadian dollar and the US dollar exchange rates. ...
... p < 0.0000). This findings of the validity of the PPP hypothesis is in line with earlier studies such as (Arize, Malindretos, & Ghosh, 2010, 2015Coakley & Snaith, 2004;Mishra & Sharma, 2010;Sugimota, 2009). However, the Hadri LM test rejects the validity of the PPP hypothesis. ...
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... Where the absolute purchasing power parity hypothesis suggests that the exchange rate between any two countries will equal the relative prices between them, as in the following formula: This formula includes that the rise or fall in domestic price level relative to foreign price level will lead to the appreciation or devaluation of the domestic currency in relative to foreign currency. But under this assumption of integrated goods and markets (Al-Zyoud, 2015). This assumption is not achieved in the real world, therefore the possibility of the absolute PPP hypothesis to valid is difficult. ...
... Furthermore, [4], examined the long-run changes among the U.S. dollar and the Canadian dollar exchange rates using the Engle-Granger cointegration test. The investigation proposes that absolute PPP did not hold meaning that there was no long-run association betwixt the Canadian Dollar and the U.S. dollar exchange rate. ...
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The purchasing power parity theory says that the trade rates among two nations ought to be equivalent to the proportion of the total price levels between the two nations. For more than a decade, there has been substantial interest in testing for the validity of the Purchasing Power Parity (PPP) empirically. This paper performs a series of tests to see if PPP is valid for ASEAN-5 nations for the period of 2000-2016 using monthly data. For this purpose, we conducted four different tests of stationarity, two cointegration tests (Pedroni and Westerlund), and also the VAR model. The stationarity (unit root) tests reveal that the variables are not stationary at levels however stationary at first difference. Cointegration test results did not reject the H0 of no cointegration implying the absence long-run association among the variables and results of the VAR model did not reveal a strong short-run relationship. Based on the data, we, therefore, conclude that PPP is not valid in long-and short-run for ASEAN-5 during 2000-2016.
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... Many recent studies have examined the hypothesis of PPP in different countries, the most recent by Al-Zyoud (2015) examines the long run movement between Canadian dollar and US dollar exchange rates for the period 1995:01 to 2008:08 and employs the Engle- Granger cointegration test. The analysis suggests that absolute purchasing power parity does not hold, indicating no long run relationship between the observed exchange rate and PPP rate. ...