diff --git a/src/main.py b/src/main.py
index 824c228..317b068 100644
--- a/src/main.py
+++ b/src/main.py
@@ -149,7 +149,7 @@ def rerank(preds, labels, output, ratios, algorithm: str = 'det_greedy', k_max:
         return idx, probs, (finish_time - start_time)
 
     @staticmethod
-    def eval_fairness(preds, labels, reranked_idx, ratios, output, algorithm, k_max, eq_op: bool = False) -> pandas.DataFrame:
+    def eval_fairness(preds, labels, reranked_idx, ratios, output, algorithm, k_max, eq_op: bool = False, metrics: list = ['ndkl',]) -> pandas.DataFrame:
         """
         Args:
             preds: loaded predictions from a .pred file
@@ -164,18 +164,28 @@ def eval_fairness(preds, labels, reranked_idx, ratios, output, algorithm, k_max,
         # because the mapping between popular/nonpopular and protected/nonprotected is reversed
         if algorithm == 'fa-ir':
             labels = [not value for value in labels]
-
-        dic_before = {'ndkl':[]}; dic_after={'ndkl':[]}
-        for i, team in enumerate(tqdm(preds)):
-            if eq_op:
-                r = {True: 1 - ratios[i], False: ratios[i]}
-            else:
-                r = ratios
-            member_popularity_probs = [(m, labels[m], float(team[m])) for m in range(len(team))]
-            member_popularity_probs.sort(key=lambda x: x[2], reverse=True)
-            #IMPORTANT: the ratios keys should match the labels!
-            dic_before['ndkl'].append(reranking.ndkl([label for _, label, _ in member_popularity_probs], r))
-            dic_after['ndkl'].append(reranking.ndkl([labels[int(m)] for m in reranked_idx[i]], r))
+        dic_before, dic_after = dict(), dict()
+        if 'ndkl' in metrics:
+            dic_before['ndkl'], dic_after['ndkl'] = list(), list()
+            for i, team in enumerate(tqdm(preds)):
+                if eq_op:
+                    r = {True: 1 - ratios[i], False: ratios[i]}
+                else:
+                    r = ratios
+                member_popularity_probs = [(m, labels[m], float(team[m])) for m in range(k_max)]
+                member_popularity_probs.sort(key=lambda x: x[2], reverse=True)
+                #IMPORTANT: the ratios keys should match the labels!
+                dic_before['ndkl'].append(reranking.ndkl([label for _, label, _ in member_popularity_probs], r))
+                dic_after['ndkl'].append(reranking.ndkl([labels[int(m)] for m in reranked_idx[i]], r))
+        if 'skew' in metrics:
+            dic_before['skew'], dic_after['skew'] = list(), list()
+            for i, team in enumerate(tqdm(preds)):
+                if eq_op:
+                    r = {True: 1 - ratios[i], False: ratios[i]}
+                else:
+                    r = ratios
+                member_popularity_probs = [(m, labels[m], float(team[m])) for m in range(len(team))]
+                member_popularity_probs.sort(key=lambda x: x[2], reverse=True)
 
         df_before = pd.DataFrame(dic_before).mean(axis=0).to_frame('mean.before')
         df_after = pd.DataFrame(dic_after).mean(axis=0).to_frame('mean.after')