Somewhere between these extremes is the United States. Initially, the 2009 stimulus package shored up the safety net. But there are warning signs — beyond the higher suicide rate — that health trends are worsening. Prescriptions for antidepressants have soared. Three-quarters of a million people (particularly out-of-work young men) have turned to binge drinking. Over five million Americans lost access to health care in the recession because they lost their jobs (and either could not afford to extend their insurance under the Cobra law or exhausted their eligibility). Preventive medical visits dropped as people delayed medical care and ended up in emergency rooms. (President Obama’s health care law expands coverage, but only gradually.)

The $85 billion “sequester” that began on March 1 will cut nutrition subsidies for approximately 600,000 pregnant women, newborns and infants by year’s end. Public housing budgets will be cut by nearly $2 billion this year, even while 1.4 million homes are in foreclosure. Even the budget of the Centers for Disease Control and Prevention, the nation’s main defense against epidemics like last year’s fungal meningitis outbreak, is being cut, by $293 million this year.

To test our hypothesis that austerity is deadly, we’ve analyzed data from other regions and eras. After the Soviet Union dissolved, in 1991, Russia’s economy collapsed. Poverty soared and life expectancy dropped, particularly among young, working-age men. But this did not occur everywhere in the former Soviet sphere. Russia, Kazakhstan and the Baltic States (Estonia, Latvia and Lithuania) — which adopted economic “shock therapy” programs advocated by economists like Jeffrey D. Sachs and Lawrence H. Summers — experienced the worst rises in suicides, heart attacks and alcohol-related deaths.

Countries like Belarus, Poland and Slovenia took a different, gradualist approach, advocated by economists like Joseph E. Stiglitz and the former Soviet leader Mikhail S. Gorbachev. These countries privatized their state-controlled economies in stages and saw much better health outcomes than nearby countries that opted for mass privatizations and layoffs, which caused severe economic and social disruptions.

Like the fall of the Soviet Union, the 1997 Asian financial crisis offers case studies — in effect, a natural experiment — worth examining. Thailand and Indonesia, which submitted to harsh austerity plans imposed by the I.M.F., experienced mass hunger and sharp increases in deaths from infectious disease, while Malaysia, which resisted the I.M.F.’s advice, maintained the health of its citizens. In 2012, the I.M.F. formally apologized for its handling of the crisis, estimating that the damage from its recommendations may have been three times greater than previously assumed.

America’s experience of the Depression is also instructive. During the Depression, mortality rates in the United States fell by about 10 percent. The suicide rate actually soared between 1929, when the stock market crashed, and 1932, when Franklin D. Roosevelt was elected president. But the increase in suicides was more than offset by the “epidemiological transition” — improvements in hygiene that reduced deaths from infectious diseases like tuberculosis, pneumonia and influenza — and by a sharp drop in fatal traffic accidents, as Americans could not afford to drive. Comparing historical data across states, we estimate that every $100 in New Deal spending per capita was associated with a decline in pneumonia deaths of 18 per 100,000 people; a reduction in infant deaths of 18 per 1,000 live births; and a drop in suicides of 4 per 100,000 people.