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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Multidimensional panel data ： ウィキペディア英語版 Multidimensional panel data In econometrics, panel data is data observed over two dimensions (typically, time and cross-sections). A panel data set is termed "multidimensional" when the phenomenon is observed over three or more dimensions. An example is a data set containing forecasts produced by multiple individuals (the first dimension) forecasting multiple macroeconomic variables (the second dimension) at multiple time horizons (the third dimension) and for multiple target periods (the fourth dimension). ==Analysis of panel data== A multidimensional panel with four dimensions can have the form : $X\_,\; \backslash ;\; i\; =\; 1,\; \backslash dots,\; N,\; \backslash ;\; s\; =\; 1,\; \backslash dots,\; S,\; \backslash ;\; t\; =\; 1,\; \backslash dots,\; T,\; \backslash ;\; h\; =\; 1,\; \backslash dots,\; H,\; \backslash ,$ where ''i'' is the individual dimension, ''s'' is the series dimension, ''t'' is the time dimension, and ''h'' is the horizon dimension. A general multidimensional panel data regression model is written as : $y\_\; =\; \backslash alpha\; +\; X\_\; \backslash beta\; +\; u\_.\backslash ,$ Complex assumptions can be made on the precise structure of the correlations among errors in this model. For example, serial correlation (error terms correlated across time) has multiple distinct meanings. Error terms can be correlated across time for the same series, individual, and horizon. They can be correlated across time and across series for the same individual and horizon, etc. Similarly, heteroskedasticity can be defined across individuals for the same series, time, and horizon, across individuals and different series for the same time and horizon, etc. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Multidimensional panel data」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.