chore: rebuild studies_index.json to include study_013

Made-with: Cursor

Author: assassin808

co_website/data/studies_index.json

@@ -132,6 +132,23 @@
       "year": 1995,
       "description": "We designed an experiment to study trust and reciprocity in an investment setting. This design controls for alternative explanations of behavior including repeat game reputation effects, contractual precommitments, and punishment threats. Observed decisions suggest that reciprocity exists as a basic element of human behavior and that this is accounted for in the trust extended to an anonymous counterpart. A second treatment, social history, identifies conditions which strengthen the relationship between trust and reciprocity....",
       "contributors": []
+    },
+    {
+      "study_id": "study_013",
+      "title": "Opportunity Evaluation under Risky Conditions: The Cognitive Processes of Entrepreneurs",
+      "authors": [
+        "Hean Tat Keh",
+        "Maw Der Foo",
+        "Boon Chong Lim"
+      ],
+      "year": 2002,
+      "description": "This study examines how cognitive biases affect entrepreneurs' opportunity evaluation under risky conditions. Using a survey of 77 founders of top SMEs in Singapore, the study measures overconfidence, illusion of control, belief in the law of small numbers, and planning fallacy, then relates those constructs to risk perception and opportunity evaluation for a standardized business vignette. The benchmark reproduces the paper's calibration test and its reported regression findings: entrepreneurs are overconfident, risk perception negatively predicts opportunity evaluation, illusion of control lowers risk perception and increases opportunity evaluation before mediation, and belief in the law of small numbers increases opportunity evaluation in the pre-mediation model.",
+      "contributors": [
+        {
+          "name": "Guankai Zhai",
+          "github": "https://github.com/zgk2003"
+        }
+      ]
     }
   ]
 }