PARIS — The global recession has reshaped key aspects of the payment card industry, executives participating in a roundtable discussion here said, but most of the panelists said the worst of the economic downturn is past and that there is some room for cautious optimism about 2010.

Ken Howes, a director of the consultancy Edgar, Dunn & Co., who moderated the World Card Summit panel last week at the Cartes and IDentification conference, said the economic crisis has wrought some fundamental changes.

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