A European Central Bank programme of Quantitative Easing based on German government bonds would be a useful move. It would help to eliminate structural imbalances and push up the price of other eurozone assets

Should the European Central Bank finally join the Federal Reserve, the Bank of England, and the Bank of Japan and deliver a good, stiff dose of Quantitative Easing?

Maybe, came the surprise response from the hawkish Bundesbank president on March 25.  But ‘any private or public assets that we might buy’, Jens Weidmann warned, ‘would have to meet certain quality standards’.

That’s a big but, as the quality of eurozone assets has deteriorated markedly since 2009.  In fact, if the ECB were to limit its asset purchases to the universe of AAA-rated eurozone sovereign debt and securitised assets a whopping 80% of the total available would be German Bunds.

But would a eurozone QE programme focused on gobbling up Bunds be such a bad idea?  We don’t think so.

First, it might actually play a useful role in helping to eliminate structural imbalances within the eurozone by pushing up German prices and wages disproportionately.

‘While buying Greek or Portuguese paper could help tame deflation there,’ an unnamed Eurosystem official recently told Reuters, ‘the falling consumer prices in these countries were part of a natural adjustment of their economies to become more competitive, and were actually welcome’.

Second, through the so-called portfolio-balance effect the prices of other eurozone assets will also be pushed up (and their yields down) as eurozone banks replace the Bunds they sell to the ECB with other securities.

The Fed’s purchases of Treasury bonds and mortgage-backed securities most surely boosted asset prices across the spectrum in the United States (and abroad – just ask the ever-voluble Brazilian finance minister); the effect should be similarly broad in Europe.

Finally, if an AAA focus for eurozone QE were the price of getting Germany on board politically, it would be a small price to pay.

ECB president Mario Draghi’s 2012 pledge to do ‘whatever it takes’ remains in the background should he ultimately feel the need to operationalise OMT (Outright Monetary Transactions) and push down sovereign yields in Spain, Portugal, Italy or elsewhere.

Benn Steil is senior fellow and director of international economics and Dinah Walker is an analyst at the Council on Foreign Relations. This post first appeared on the CFR Geo-Graphics Blog