#463 1994 · Central Bank of Brazil / Pérsio Arida and André Lara Resende (Plano Real economic team) · Central banking / macroeconomic policy
Brazil ended hyperinflation by inventing a currency nobody had to trust yet, and switching to it only after everyone already had
问题
Five previous price freezes to stop hyperinflation had already failed and backfired
背景
By the early 1990s Brazil's inflation was entrenched not just in prices but in law: wages, rents and contracts were automatically indexed to past inflation, so each month's price rises mechanically fed the next month's, and by early 1994 monthly inflation was running near 40 to 50 percent. Five previous stabilization attempts across the 1980s and early 1990s — the Cruzado, Bresser, Summer and two Collor plans — had all tried to break the cycle by freezing prices and wages by government decree, and all five had failed.
Every freeze locked in whatever real wages and prices happened to exist at that exact moment, unfair to anyone whose last adjustment fell earliest in the cycle, and Brazilians had by now watched five supposedly 'stable' currencies get renamed and devalued out from under them. Nobody believed a sixth new currency would behave any differently, so businesses raised prices pre-emptively the instant any new stabilization plan was even announced, undoing it before it started.
换别人会怎么做
Freeze prices and wages by decree, the way Brazil's five previous stabilization plans all had. Every one failed, because a freeze locks in whatever unfair, mistimed real wages and prices existed at the exact moment it was imposed, and because everyone braces for prices to leap the instant the freeze is lifted.
他们看到了什么
Brazilians didn't distrust the idea of stable money — they distrusted the currency itself, having watched five previous 'stable' currencies get renamed and devalued out from under them. So don't ask anyone to trust a new currency yet: let a purely notional, dollar-pegged unit of account run in parallel with the still-inflating currency, used only for quoting prices and wages while actual payment stayed in the old, distrusted money, so people could watch the parallel unit hold its value for months before a single new banknote had to change hands.
那一手
Economists Pérsio Arida and André Lara Resende, refining a proposal they had first sketched a decade earlier, had the government introduce the Unidade Real de Valor (URV) in February 1994 — not a new currency at all, but a purely notional unit of account, pegged one-to-one to the U.S. dollar, running in parallel with the real money still circulating and still being paid. Every price and wage was quoted in both the old, still-inflating cruzeiro real and the stable URV, with the URV's cruzeiro-real conversion rate recalculated daily to track actual inflation exactly, so nobody's URV-denominated pay or price ever silently lost ground even as the physical currency paying for it kept collapsing.
为什么管用
Every price and wage carried a URV-denominated tag alongside its cruzeiro-real price, and the cruzeiro-real cost of one URV was recalculated daily to track the real currency's actual depreciation, so nobody's real income silently fell behind the way a frozen wage would have. Because the URV held a fixed dollar peg, agents watched it stay stable month after month well before any new banknote existed to physically hand out — replacing distrust of an announcement with directly observed evidence. By the time the URV became the real on July 1, 1994, nothing about daily pricing or payment actually changed except the name on the money, so there was no discontinuity left to spook anyone into pre-emptive price hikes.
值了多少
For roughly four months Brazilians watched the URV hold its value against the dollar while the currency around it visibly inflated — proof, not a promise, that stable money was possible. On July 1, 1994, the URV was simply renamed the real at a fixed one-to-one rate, with no freeze and no forced conversion shock, because by then the whole economy was already pricing and negotiating in URV terms. Monthly inflation, which had been running near 40 to 50 percent, collapsed within months, and the hyperinflation that had gripped Brazil since the 1980s ended for good.
什么时候会失灵
It needs a credible external anchor the government cannot itself manipulate — Brazil used the dollar — or the parallel unit simply inherits the same distrust as the currency it's meant to replace. It also needs the transition to run long enough for observed stability to overwrite ingrained expectations without stretching the burden of maintaining two parallel pricing systems past what businesses can sustain; Brazil's ran about four months, long enough to build confidence without becoming its own source of confusion.
后来呢
The Real Plan is remembered as one of the most successful disinflation programs in modern economic history, and its central device — proving a stable currency works before asking anyone to actually use one — has been studied as a model for other economies escaping entrenched, indexation-driven inflation. Fernando Henrique Cardoso, the finance minister who oversaw the plan, was elected president of Brazil later that same year, largely on its success.
资料来源
- [1]Thirty Years of the Real Plan: Memories, lessons learned, and challengesFundação FHC, 2024fundacaofhc.org.br
- [2]The Case of BrazilBecker Friedman Institute for Economics, University of Chicago, 2023manifold.bfi.uchicago.edu