economic path dependence means early technological choices compound irreversibly through dominant designs and industrial structures
Path dependence means that the sequence of historical events -- not just current conditions -- determines the available options. A technology adopted early attracts complementary investments (tooling, training, infrastructure, regulation) that make alternatives increasingly expensive to adopt, even if those alternatives are objectively superior. The result: the economy locks into technological paradigms that reflect historical accidents as much as technical merit.
Arthur (1989) proved this mathematically: under increasing returns to adoption (network effects, learning curves, coordination benefits), the long-run outcome of competing technologies depends on early adoption events that are essentially random. Two equally capable technologies, both with increasing returns, will produce a winner-take-all outcome where the technology that gets ahead early locks in -- and which one gets ahead is determined by noise in early adoption, not by fundamental superiority.
The mechanism operates through four reinforcing channels: (1) Learning by doing -- the more a technology is used, the more it improves through accumulated experience. (2) Network externalities -- the more users, the more valuable it is to other users. (3) Complementary investments -- infrastructure, training programs, supply chains co-specialize around the dominant technology. (4) Institutional adaptation -- regulations, standards, and professional practices embed assumptions specific to the dominant technology.
The product space (Hidalgo 2007) shows this at the national scale: countries diversify into products that are "nearby" in capability space -- products that use similar knowledge, infrastructure, and institutions. A country that produces electronics can move to precision instruments but not easily to petrochemicals. This means a country's early industrial choices constrain its entire future development trajectory through the capabilities they build (and the capabilities they don't).