Inflation Explained

Since mid-2021, the euro area has experienced its highest inflation rate since the creation of the European Monetary Union, and that crisis exposed something uncomfortable about how modern economies work. ^[1] When prices rise broadly across the board, it's not just an abstract economic statistic. It erodes real incomes and can widen inequality between those who can protect themselves and those who cannot. ^[2] A pensioner living on a fixed payment watches that payment buy less groceries each month. A young family saving for a house watches their deposit grow slower than the cost of the house itself. These aren't edge cases. High inflation negatively affects firms and households in concrete, measurable ways. ^[2]

The mechanism is deceptively simple. When inflation runs hot, the purchasing power of money shrinks. A dollar or a euro buys less than it did before. But here's what makes this problem especially thorny for policymakers: the moment they try to fix it, they face a brutal trade-off. Central banks responded to high inflation by significantly tightening monetary policy stances, which constrained demand through rising borrowing costs and reduced credit flows. ^[2] This is how the cure works, but it's also how recessions happen. The question becomes not whether to tighten, but how much and how fast. The central bank toolkit for fighting inflation has several moving parts. Monetary policy tightening, including interest rate hikes and balance sheet reduction through Quantitative Tightening, is a standard feature of responding to high inflation and constrains demand. ^[2] When a central bank raises its benchmark interest rate, borrowing becomes more expensive for businesses and households. Banks pass higher rates to customers. A business thinking about building a new factory suddenly faces higher financing costs. That project gets shelved. Credit becomes tighter. Over time, this cooling effect reduces spending and, eventually, inflation. But the timing is the killer. Consider the dilemma central banks faced during the recent inflationary episode. Earlier interest rate hikes, starting in the final quarter of 2021, could have reduced peak inflation but would have led to a prolonged recession. Delayed hikes, such as those starting in the first quarter of 2024, would have fueled persistent inflation above 4 percent until 2026. ^[3] There was no painless path forward. Every option carried consequences. A front-loaded approach would have crushed the economy sooner but harder. A slower approach would have let inflation embed itself deeper into wage and price expectations, making it harder to dislodge later.

This brings us to the heart of inflation persistence. When workers expect inflation to continue, they demand higher wage increases. When firms expect inflation, they raise prices preemptively. The problem becomes self-fulfilling. Uncertainty surrounding wage, profit, and price dynamics may necessitate a more front-loaded increase in interest rates for monetary policy. ^[4] This is precisely because waiting risks locking in those expectations. Central bank communication and transparency are key elements of monetary policy strategies and tactics, especially in complex and uncertain environments, according to the Federal Reserve. ^[5] A well-credible central bank can talk down inflation expectations before it becomes entrenched in behavior. That credibility is fragile and takes years to build but minutes to lose.

The persistence of inflation was genuinely surprising. The US experience illustrated why. The post-pandemic inflation surge reflected severe imbalances between supply and demand, stemming from pandemic shocks and policy responses. ^[6] Factories shut down. Supply chains broke. Meanwhile, fiscal stimulus kept consumer spending elevated. You had record demand chasing constrained supply. Under those conditions, inflation was inevitable. Yet not all of inflation's spread followed predictable channels. Measures of short-term inflation expectations increased alongside realized inflation, especially among households and firms, potentially contributing to inflation persistence through price- and wage-setting. ^[6] People saw rising prices, concluded inflation would continue, and adjusted their behavior accordingly. This matters because one factor did anchor expectations and prevent an even worse outcome. Longer-term inflation expectations remained generally well-anchored during the post-pandemic period, which likely prevented a larger or more lasting increase in inflation. ^[6] People still believed that central banks would eventually regain control, that inflation would return to normal. That belief, fragile as it was, provided a crucial stabilizing force.

But here's where the story takes another turn. Policymakers had to continually revise upwards their plans for tightening policy as economies proved more resilient than expected and the supply side recovered slower than anticipated. ^[7] They started with one forecast, then data came in showing the economy could withstand more aggressive rate hikes. Meanwhile, supply bottlenecks persisted longer than anyone had predicted. This gap between initial expectations and reality forced central banks to keep adjusting. They tightened more than they originally planned, precisely because the conditions that demanded tightening stuck around longer. The policy response ultimately succeeded in bringing inflation down, but the path revealed how narrow the corridor is between acceptable inflation and recession risk. The next section examines how inflation distorts the signals that guide investment and consumption decisions in the first place.

Thanks for listening to this VocaCast briefing. Until next time.