After a decade and a half of seeing the U.S. economy pull ahead thanks to its outsize technology sector, European politicians are desperate to fight back in emerging industries such as green energy. One challenge they face is that America also keeps pulling ahead in the business of financing the investments required.

On Thursday, Luxembourg for Finance—a public-private partnership that seeks to promote the financial industry in the low-tax city state—published a report detailing the different ways in which European banks and asset managers might regain an edge relative to U.S. and Asian peers.