Translate the following English sentence to French:
"In cross-border cooperation, greater emphasis must be placed on improving the conditions for the economic activity of the small and medium-sized undertakings which are the job creators."
Dans le cadre de la coopération transfrontalière, une importance accrue doit être accordée à l' amélioration des conditions d' exploitation des petites et moyennes entreprises créatrices d' emplois.