Predicting Lotto Numbers

Economics

Speaker:Sigrid Suetens, Tilburg University
Date: Friday 4 November 2011
Time: 16.15
Location: STC/D

Further details

We investigate the ‘law of small numbers’ using a unique panel data set on lotto gambling. Because we can track individual players over time, we can measure how they react to outcomes of recent lotto drawings. We can therefore test whether they behave as if they believe they can predict lotto numbers based on recent drawings. While most players pick the same set of numbers week after week without regards of numbers drawn or anything else, we find that those who do change, act on average in the way predicted by the law of small numbers as formalized in recent behavioral theory. In particular, on average they move away from numbers that have recently been drawn, in line with the ‘gambler's fallacy’, and move toward numbers drawn several weeks in a row, consistent with the ‘hot hand fallacy’.