Enable compatability with pandas 2.0

Signed-off-by: Keith Battocchi <kebatt@microsoft.com>

econml/data/dynamic_panel_dgp.py

@@ -135,7 +135,7 @@ def simulate_residuals(ind):
 
 
 def simulate_residuals_all(res_df):
-    res_df_new = res_df.copy(deep=True)
+    res_df_new = res_df.astype(dtype='float64', copy=True, errors='raise')
     for i in range(res_df.shape[1]):
         res_df_new.iloc[:, i] = simulate_residuals(i)
     # demean the new residual again

notebooks/Solutions/Causal Interpretation for Ames Housing Price.ipynb

@@ -598,7 +598,7 @@
     "X = Xy.drop(columns = 'SalePrice')\n",
     "X_ohe = (\n",
     "    X\n",
-    "    .pipe(pd.get_dummies, prefix_sep = '_OHE_', columns = categorical)\n",
+    "    .pipe(pd.get_dummies, prefix_sep = '_OHE_', columns = categorical, dtype='uint8')\n",
     ")\n",
     "y = Xy['SalePrice']"
    ]

notebooks/Solutions/Causal Interpretation for Employee Attrition Dataset.ipynb

@@ -432,7 +432,7 @@
    "outputs": [],
    "source": [
     "categorical = []\n",
-    "for col, value in attritionXData.iteritems():\n",
+    "for col, value in attritionXData.items():\n",
     "    if value.dtype == \"object\":\n",
     "        categorical.append(col)\n",
     "\n",