Industry Concentration and Information Technology

Abstract

Industry concentration has been rising in the United States since 1980. Does this signal declining competition and the need for a new antitrust policy? Or are other factors causing concentration to increase? This paper explores the role of proprietary information technology (IT), which could increase the productivity of top firms relative to others and raise their market share. Instrumental variable estimates find a strong link between proprietary IT and rising industry concentration, accounting for most of its growth. Moreover, the top four firms in each industry benefit disproportionately. Large investments in proprietary software—$250 billion per year—appear to significantly impact industry structure.

Cite this work

No public copy is stored for this record, so only the metadata is cited.

Stored only when both papers are in the corpus — 114 citations exist upstream.

Papers that cite the same references — the relational fallback while embeddings are still backfilling.