TY - GEN AU - Mansfield, Edwin C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1996-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.GCR.99-780 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1996 TI - Estimating social and private returns from innovations based on the advanced technology program::problems and opportunities ER -