OBR model criticized for mispricing growth and omitting shocks
What happened
Michael Martins argues that the Office for Budget Responsibility's model should be reformed ahead of the next Budget. He states that the OBR treats economic behavior as linear, assuming people and firms respond in a single, proportionate way to policy changes. Martins contends that because real-world responses compound and interact—such as businesses relocating or investment being deferred—a model capturing only first-order effects will misprice growth.
From cityam.com
Why it matters
The OBR quantifies the government's fiscal headroom, which determines its room to tax and spend. If the model misprices growth by ignoring compounding effects, the government's assessment of its fiscal capacity could be inaccurate.
From cityam.com
Who's involved
- Office for Budget ResponsibilityProvides independent fiscal forecasts and advice that shapes policy commitments
- John HealeyIs involved in the discussion regarding the reform of the OBR
- Rachel ReevesHer policy evaluation relies on the independent fiscal forecasts provided by the OBR
- governmentUses the OBR's independent fiscal forecasts to guide budget and spending plans
Who could feel it
Possible knock-on effectsThese are possibilities Brind reasoned out, not predictions, and not advice. Most are not stated in any report.
- IfsSpeculative
IFS might see increased demand for independent economic analysis due to the critique of OBR's modeling.