John Muellbauer

John Norbert Joseph Muellbauer FBA (born 17 July 1944) is a British economist noted for influential contributions to applied microeconomics and macroeconomics, especially in consumer demand, housing economics, and macro-financial modelling. He co-developed the Almost Ideal Demand System (AIDS) with Angus Deaton and co-authored the graduate text Economics and Consumer Behaviour. Beginning in the late 1980s, he was one of the first economists to focus on the complex interactions between housing markets and the economy. Over subsequent decades, he extended his research to the roles of household balance sheets, credit constraints, and housing markets, developing econometric techniques to measure unobserved credit conditions and demonstrating how housing booms and busts transmit to the real economy. In 2014, Muellbauer wrote a famous call for a 'quantitative easing for people' in the Eurozone.

He is Senior Research Fellow of Nuffield College, Oxford and of the Institute for New Economic Thinking at the Oxford Martin School, University of Oxford.

Education and career Muellbauer was born in Bavaria, Germany, and moved with his family to the United Kingdom in the early 1950s. He read economics at King's College, Cambridge, and completed a Ph.D. at the University of California, Berkeley, where he studied with Daniel McFadden, Dale W. Jorgenson, and Robert Hall. and has advised numerous central banks and governments on housing, credit markets, and macro-financial policy.

Honours Muellbauer was elected Fellow of the Econometric Society (1975), Fellow of the British Academy (1997), and Fellow of the European Economic Association (2006). and The Review of Economic Studies.

Major scholarly contributions Muellbauer’s early research used duality theory to model welfare and demand, introducing “generalised linearity’’ and “price-independent generalised linearity’’ preference classes that enabled aggregation across heterogeneous households with fewer restrictions. He applied duality to cost-of-living indices, and household equivalence scales. With Angus Deaton, he developed the Almost ideal demand system (AIDS) model, Their book Economics and Consumer Behaviour integrated duality theory with applied demand systems and remains influential. and representative-agent Euler-equation approaches as in Robert Hall's Random walk model of consumption, to the life-cycle/permanent-income hypothesis. With Anthony Murphy, he showed how housing markets and financial liberalisation increased borrowing against home equity, making consumption highly sensitive to house-price cycles, anticipating research on collateral channels and the Great Recession. His work highlighted institutional heterogeneity in transmitting credit and monetary policy shocks.

Research with Anthony Murphy and Gavin Cameron developed regional house-price and migration models with links between labour markets and housing dynamics illuminating regional evolutions. To measure shifts in credit conditions, Muellbauer introduced latent-variable methods—later termed the “Latent Interactive Variable Equation System’’ (LIVES)—to derive credit-conditions indices from joint systems of consumption, debt, and mortgage data. Extended with Janine Aron, Valerie Chauvin, John Duca and others to the US, Canada, Germany, France, and South Africa, this improved consumption models by incorporating credit supply shifts. With Duca and Murphy he synthesised international evidence on mortgage finance, credit standards, and macroeconomic amplification . He and Aron provided UK evidence on mortgage-default and foreclosure channels, and later analysed macroprudential policy from a housing perspective.

Forecasting has been another strand, including gross domestic product, inflation, and mortgage defaults. With Aron he built equilibrium-correction models of the price level, improving US inflation forecasts and analysing exchange-rate pass-through in emerging economies. Reduced-form income forecasting models replicating household responses to structural breaks such as the Global Financial Crisis supported the generalised consumption function as an alternative to conventional policy models.

Selected publications

Deaton, A & Muellbauer, J (1980). "An Almost Ideal Demand System". American Economic Review. 70 (3): 312–326.

Deaton, A & Muellbauer, J (1980). Economics and Consumer Behaviour. Cambridge University Press.