Lottery

A draw-based game in which players buy numbered entries hoping to match randomly drawn numbers, funded on a pari-mutuel basis with a large takeout deducted before prizes.

Definition

A Lottery sells numbered tickets or number selections and pays prizes to entries that match some or all of a random draw, with the biggest prizes for matching the full set. Most large lotteries are pari-mutuel: the prize fund is a fixed share of ticket sales, so the more that is sold the larger the pool, and jackpots roll over when not won. The takeout, the portion of sales not returned as prizes, is very high, frequently 30-50 percent, with much of it directed to operating costs, taxes and, in state lotteries, public good causes. This makes lotteries among the most negative-expected-value gambling products available; they are best understood as low-stake entertainment or a form of voluntary contribution, not an investment or income strategy.

Worked example

A national lottery costs a fixed amount per line; a player matches three of six main numbers for a small fixed prize, while the multi-million jackpot requires all six and rolls over for weeks when unclaimed.

Why it matters

The lottery is the archetype of high-takeout, low-odds gambling and public-benefit funding; learners grasp expected value at its starkest, professionals see pari-mutuel prize funding in its purest form.

Related

Note: Takeout rates differ greatly between lotteries and games; the 30-50 percent range is typical for major draw lotteries but not universal.