Other factors are also common across both crises—long-run supply con- straints, growing demand stemming from sustained economic growth, weather shocks, export bans, and hoarding—but these residual factors played rela- tively minor roles, although such factors either triggered additional problems (for instance, the U.S.-Soviet grain deal) or exacerbated each crisis once the wheels were set in motion. These similarities between the two crises suggest that there is scope for contemporary policymakers to learn from the suc- cesses and failures of the 1972–74 crisis.