Browsing Department of Economics (ECO) by Author "XU, Fang"
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Title:The role of the log transformation in forecasting economic variables Author(s):LUETKEPOHL, Helmut; XU, FangDate:2012Citation:Empirical Economics, 2012, Vol. 42, No. 3, pp. 619-638Version:Published version of EUI MWP WP 2009/06Type:ArticleAbstract:For forecasting and economic analysis many variables are used in logarithms (logs). In time series analysis, this transformation is often considered to stabilize the variance of a series. We investigate under which conditions ...
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Title:A Functional Coefficient Model View of the Feldstein-Horioka Puzzle Author(s):HERWARTZ, Helmut; XU, FangDate:2010Citation:Journal of International Money and Finance, 2010, 29, 1, 37-54Type:ArticleAbstract:What does the saving-investment (SI) relation really measure and how should the SI relation be measured? These are two of the most discussed issues triggered by the so-called Feldstein-Horioka puzzle. Based on panel data ...
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Title:Forecasting Annual Inflation with Seasonal Monthly Data: Using Levels versus Logs of the Underlying Price Index Author(s):LUETKEPOHL, Helmut; XU, FangDate:2009Type:Working PaperSeries/Number:EUI MWP; 2009/37Abstract:This paper investigates whether using natural logarithms (logs) of price indices for forecasting inflation rates is preferable to employing the original series. Univariate forecasts for annual inflation rates for a number ... -
Title:The Role of log Transformation in Forecasting Economic Variables Author(s):LUETKEPOHL, Helmut; XU, FangDate:2009Type:Working PaperSeries/Number:EUI MWP; 2009/06Abstract:For forecasting and economic analysis many variables are used in logarithms (logs). In time series analysis this transformation is often considered to stabilize the variance of a series. We investigate under which ...