Reports that show productivity gains using geospatial around the world include:

The Socio-Economic Impact of the Spatial Data Infrastructure of Catalonia (April 2008)

http://www.epsiplatform.eu/psi_library/reports/the_socio_economic_impact_of_the_spatial_data_infrastructure_of_catalonia_april_2008

Spatial Information in the New Zealand Economy

http://www.geospatial.govt.nz/productivityreport/