What have the economists ever done for us?

Artículo de Andy Haldane

"One strain of this virus is an old one. Cycles in money and bank credit are familiar from centuries past. And yet, for perhaps a generation, the symptoms of this old virus were left untreated. That neglect allowed the infection to spread from the financial system to the real economy, with near-fatal consequences for both.

In many ways, this was an odd disease to have contracted. The symptoms should have been all too obvious from history. The interplay of bank money and credit and the wider economy has been pivotal to the mandate of central banks for centuries. For at least a century, that was recognised in the design of public policy frameworks. The management of bank money and credit was a clear public policy prerequisite for maintaining broader macroeconomic and social stability.

 Two developments – one academic, one policy-related – appear to have been responsible for this surprising memory loss. The first was the emergence of micro-founded dynamic stochastic general equilibrium (DGSE) models in economics. Because these models were built on real-business-cycle foundations, financial factors (asset prices, money and credit) played distinctly second fiddle, if they played a role at all.

 The second was an accompaying neglect for aggregate money and credit conditions in the construction of public policy frameworks. Inflation targeting assumed primacy as a monetary policy framework, with little role for commercial banks' balance sheets as either an end or an intermediate objective. And regulation of financial firms was in many cases taken out of the hands of central banks and delegated to separate supervisory agencies with an institution-specific, non-monetary focus.

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Second, it underlines the importance of reinstating money, credit and banking in the core curriculum, as well as refocusing on models of the interplay between economic and financial systems. These are areas that also fell out of fashion during the pre-crisis boom.

Third, the crisis showed that institutions really matter, be it commercial banks or central banks, when making sense of crises, their genesis and aftermath. They too were conveniently, but irresponsibly, airbrushed out of workhorse models. They now needed to be repainted back in."

Simon Wen-Lewis comenta