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17_Panel.ipynb

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@@ -728,7 +728,8 @@
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"cell_type": "markdown",
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"metadata": {
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"heading_collapsed": true,
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"hidden": true
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"hidden": true,
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"jp-MarkdownHeadingCollapsed": true
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},
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"source": [
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"### 説明"
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{
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"cell_type": "markdown",
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"metadata": {
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"hidden": true
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"hidden": true,
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"jp-MarkdownHeadingCollapsed": true
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},
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"source": [
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"### 推定"
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"\n",
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"(注意)\n",
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"\n",
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"時間ダミー変数の代わりに`TimeEffects`を使わないように。入れることができますが,そのような仕様になっていません。"
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"時間ダミー変数の代わりに`TimeEffects`を使わないように。\n",
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"入れてもエラーは出ませんが,`TimeEffects`は無視されて,時間ダミーがない結果と同じになります。"
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]
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},
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{
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"source": [
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"formula_re = 'lwage ~ 1 + married + union + expersq \\\n",
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" + exper + educ + black + hisp \\\n",
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" +d81+d82+d83+d84+d85+d86+d87'"
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" + d81 + d82 + d83 +d84 + d85 + d86 + d87'"
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]
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},
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{
@@ -1155,7 +1158,7 @@
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"source": [
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"formula_cre = 'lwage ~ 1 + married + union + expersq \\\n",
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" + married_mean + union_mean + expersq_mean \\\n",
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" +d81+d82+d83+d84+d85+d86+d87'\n",
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" + d81 + d82 + d83 + d84 + d85 + d86 + d87'\n",
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"\n",
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"result_cre = RandomEffects.from_formula(formula_cre, data=wagepan).fit()\n",
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"\n",
@@ -1199,7 +1202,7 @@
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"source": [
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"FEモデルとREモデルのどちらが適しているかを調べることができるHausman検定というものがある。CREモデルを使うことにより,同様の検定が簡単に行える。(式6)を考えよう。\n",
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"* $\\gamma=0$の場合,REモデルの(式5)と同じになり,REモデルが妥当ということになる。\n",
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"* $\\gamma\\neq 0$の場合,$a_i$と$\\bar{x}_{i}$は相関することになり,これは$\\text{Cov}\\left(a_i,{x}_{it}\\right)\\neq 0$を意味し,REモデルが妥当な推定方法となる\n",
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"* $\\gamma\\neq 0$の場合,$a_i$と$\\bar{x}_{i}$は相関することになり,これは$\\text{Cov}\\left(a_i,{x}_{it}\\right)\\neq 0$を意味し,FEモデルが妥当な推定方法となる\n",
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"\n",
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"この考えを利用して,次の帰無仮説と対立仮説のもとで$\\gamma$の優位性を調べる。\n",
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"* $\\text{H}_0:\\;\\text{Cov}\\left(a_i,x_{it}\\right)=0$\n",
@@ -1293,7 +1296,7 @@
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"formula_cre2 = 'lwage ~ 1 + married + union + expersq \\\n",
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" + exper + educ + black + hisp \\\n",
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" + married_mean + union_mean + expersq_mean \\\n",
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" +d81+d82+d83+d84+d85+d86+d87'\n",
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" + d81 + d82 + d83 + d84 + d85 + d86 + d87'\n",
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"\n",
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"result_cre2 = RandomEffects.from_formula(formula_cre2, data=wagepan).fit()\n",
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"\n",
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"metadata": {
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"celltoolbar": "Tags",
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"display_name": "py11",
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"language": "python",
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"name": "python3"
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"name": "py11"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.12.7"
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"version": "3.11.9"
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},
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"toc": {
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"base_numbering": 1,

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