Green transition policies and price stability
Green transition policies could affect inflation through delays in the relative price adjustment of energy-intensive goods, or economic disruptions linked to the restructuring and adaptation of the productive system. In this paper, Dees et al. analyze the impact of green transition policies on inflation in France by looking at four standard scenarios corresponding to representative cases of transition-related shocks:
- Scenario 1: Abrupt and unanticipated increase in the price of carbon. This scenario assumes an increase of USD 400 per ton in the carbon tax over the first three years which is revenue-neutral. Such a steep increase, the authors estimate, will lead to a rapid rise in inflation in France of up to 1.75 percentage points in the annual rate in the first year, and 0.6 percentage points after five years.
- Scenario 2: Temporary increase in uncertainty regarding transition policies. This scenario assumes an increase of 100 basis points in firms’ cost of financing in the financial markets and a decrease in household consumption. Although the initial impact is deflationary, after five years, this scenario shows a moderate increase in inflation.
- Scenario 3: Strong increase in public investment financed by a carbon tax. This scenario assumes a public expenditure of around EUR 27 billion per year for France, which is assumed to be paid through revenues generated by carbon taxes. In this case, inflation gradually increases up to 1.75 percentage points but declines in the second year.
- Scenario 4: Sharp rise in private investment at the expense of consumption. The considerable increase in private investment is in the form of tax credits to companies, financed by an increase in household income tax. This scenario will be deflationary with a 0.8 percentage decrease year-on-year.

The transition to carbon neutrality: effects on price stability
Authors: Stéphane Dees and Oriane Wegner, Annabelle de Gaye, Camille Thubin
From: Banque de France
Green transition policies, inflation, and central banks
In this paper, Del Negro et al. emphasize the importance of relative price stickiness in determining how carbon taxes and green subsidies impact inflation and the tradeoffs faced by monetary policy. They use a New Keynesian framework where the dirty sector represents high-emission activities and the other sector stands in for the rest of the economy. Each sector is monopolistically competitive and features nominal rigidities. In this framework, the green transition amounts to taxing production in the dirty sector with the goal of reducing its output. They find:
- In the case of carbon taxes: If prices were fully flexible, the transition would increase the relative price of dirty goods, but this adjustment in relative prices can take place under any level of overall inflation. Hence with fully flexible prices, climate policies would not pose any problem for an inflation targeting central bank. But if prices are more flexible in carbon-intensive sectors, the transition creates a tradeoff for central banks between keeping inflation low and closing the output gap.
Intuitively, the tradeoff arises because the central bank needs to nudge inflation in the sticky sector down so that the needed adjustment in relative prices occurs with an overall inflation level that is in line with its target. But this nudge involves cooling down the economy. If the central bank is not willing to do that, it may have to accept temporarily high inflation.
- In the case of subsidies to the green sector: the conclusions are reversed as the green transition is deflationary unless monetary policy engineers a positive output gap.
Is the Green Transition Inflationary?
Authors: Marco Del Negro, Julian di Giovanni, Keshav Dogra
From: Federal Reserve Bank of New York