Working Paper: NBER ID: w12459
Authors: James D. Adams; J. Roger Clemmons
Abstract: This paper describes flows of basic research through the U.S. economy and explores their implications for scientific output at the industry and field level. The time period is the late 20th century. This paper differs from others in its use of measures of science rather than technology. Together its results provide a more complete picture of the structure of basic research flows than was previously available. Basic research flows are high within petrochemicals and drugs and within a second cluster composed of software and communications. Flows of chemistry, physics, and engineering are common throughout industry; biology and medicine are almost confined to petrochemicals and drugs, and computer science is nearly as limited to software and communications. In general, basic research flows are more concentrated within scientific fields than within industries. The paper also compares effects of different types of basic research on scientific output. The main finding is that the academic spillover effect significantly exceeds that of industrial spillovers or industry basic research. Finally, within field effects exceed between field effects, while the within- and between industry effects are equal. Therefore, scientific fields limit basic research flows more than industries.
Keywords: basic research; scientific output; R&D spillovers; academic spillovers; industrial spillovers
JEL Codes: D2; O3
Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.
| Cause | Effect |
|---|---|
| academic spillovers (O36) | scientific output (C67) |
| industrial spillovers (L59) | scientific output (C67) |
| within-field academic spillover elasticity (D29) | scientific output (C67) |
| between-field academic spillover elasticity (D29) | scientific output (C67) |
| within industry elasticities (L89) | industrial spillovers (L59) |
| between industry elasticities (L16) | industrial spillovers (L59) |