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The old trade-off for any plant or office: cheap labour or a deep pool of graduates. Most countries make you choose. A few don't.
Dashed lines mark the median country. The shaded corner is the sweet spot: below-median labour cost, above-median enrolment. The link between the two is loose (r = 0.28): plenty of countries educate many people at moderate cost, so it pays to look beyond the usual names.
The sweet spot. Albania, Cyprus, China, Latvia, Croatia and Poland combine below-median labour costs with above-median enrolment. At the other end, Switzerland, Canada and France are both above median in cost and below median in enrolment.
Two caveats matter. Enrolment counts students, not finished graduates, and gross rates above 100% happen where many older or foreign students enrol. Labour cost here is the country's income per person at market prices, a good proxy for wage levels across countries but not the pay for one occupation; the place pages show occupation pay where statistics offices publish it.
Sources: World Bank WDI (GNI per capita PPP, price level, tertiary enrolment), latest year from 2015. Nestlyzer scores each measure 0–100 between the 5th and 95th percentile of the countries it covers. How the method works.