English to Spanish Bus/Financial Business/Commerce (general)

En un texto sobre el sector de servicios a empresas en Europa:

Since the late 1980s many empirical studies applied some form of input-output analysis to analyse growth factors for services sectors, often at a rather high aggregation level and mostly for one specific country. Most of the **intermediate deliveries** from business services appear to go to manufacturing, the business-services industry itself, and the public sector.

Gracias y saludos,
*:-)