Fourth Law: The most consequential driver of long-run economic growth is not capital accumulation or technological progress. It is the reduction of coordination costs.
The Growth Accounting Problem
Standard growth accounting — the decomposition of economic growth into the contributions of capital accumulation, labour, and technological progress — leaves a large share of observed growth unexplained by these measured inputs. The residual — often called total factor productivity — reflects the improvement in the efficiency with which inputs are combined to produce output. What drives total factor productivity growth? A significant part of the answer, supported by both historical evidence and contemporary research, is the reduction of coordination costs: the improvements in transaction efficiency, in information access, in contract enforcement, and in the trust infrastructure that allow the same inputs to be combined in more value-generating ways.
The fourth structural law states that the reduction of coordination costs is the primary driver of the most consequential long-run growth episodes in economic history. The growth of the modern corporation was enabled by the reduction in internal coordination costs that telegraph and telephone communication provided. The growth of global trade was enabled by the reduction in cross-border coordination costs that containerisation and the GATT/WTO framework provided. The growth of the information economy has been enabled by the reduction in digital coordination costs that the internet and its ecosystem have provided. Each growth episode corresponds to a structural reduction in the cost of aligning independent economic actors around productive joint activity.
Policy Implications
If coordination cost reduction is the primary driver of long-run economic growth, then the most consequential economic policy investments are those that reduce coordination costs at scale — the infrastructure investments in digital connectivity, in financial infrastructure, in contract enforcement, and in the standards and interoperability frameworks that allow decentralised economic actors to interact efficiently. This is a different policy portfolio than the standard growth policy focus on capital accumulation through investment incentives or technological progress through R&D subsidies — though it is complementary to both.
The fourth law: the economy grows fastest when coordination costs fall fastest. The institutions that reduce coordination costs — the payment systems, the information infrastructure, the legal frameworks, the standards — are the most consequential economic investments available. They are also the least glamorous and the most consistently underfunded.
Discussion