Canada ended its residency scramble with one national preference-based match

Before 1969, Canadian medical graduates faced a scramble: offers arrived piecemeal, applicants had to accept or reject early choices without knowing their prospects elsewhere, and programs chased candidates earlier and earlier to lock them in.

The Canadian Association of Medical Students established a national match in 1969; by 1970 the faculties, physician associations and licensing bodies joined, and the Canadian Intern Matching Service (CIMS) was created to administer it.

Applicants and programs each submit ranked preference lists; the algorithm pairs them centrally, so an applicant can rank a dream program first without risking their whole career on it.

CIMS became an independent not-for-profit in 1982 and evolved into CaRMS, which now runs the main and subspecialty matches across Canada.

Let both sides rank, then match centrally

Simultaneous matching removed the pressure to accept early offers blindly.

Applicants could state true preferences without strategic risk.

Programs saw the whole national applicant pool, not whoever called first.

A binding match ended the poaching spiral before it started.

When a market clears through chaotic bilateral offers, replace it with a simultaneous clearinghouse: central matching with binding preferences removes the incentive to lie, game or rush.

CaRMS has run the Canadian residency match for over fifty years, expanding into family-medicine and subspecialty matches; the clearinghouse model remains one of the longest-running examples of market design in medicine.