Hyperbolic discounting of self-control tasks
Also known as: Task-completion discounting
Because near-term effort is discounted least, the cost of acting now looms largest of all.
What it means
This concept applies present-biased discounting to the timing of effortful actions, explaining why tasks with immediate costs and delayed rewards are chronically postponed. Under hyperbolic or quasi-hyperbolic discounting, the disutility of effort is felt most sharply when it must be borne right now, while the delayed benefit is heavily shrunk, so 'do it later' almost always beats 'do it now.' Each day the calculus repeats, producing the indefinite slippage characteristic of naive procrastination. Sophisticated agents counter it with deadlines and commitments that raise the cost of further delay, effectively re-pricing the near-term option. The framework connects present bias directly to procrastination, task aversion, and the design of self-imposed deadlines.
Examples
Filing taxes carries an immediate effort cost and a distant reward, so present bias makes 'tomorrow' perpetually preferable until the deadline forces action.
Booking the dentist takes four minutes and spares you a year of trouble — but the four minutes are now and the trouble is later, so it waits eleven months.
A writer who sincerely means to start on Monday starts the night before it is due. The same calculation runs each morning, and 'tomorrow' wins until the deadline re-prices it.
First described in Akerlof (1991); O'Donoghue & Rabin (1999).