How “instrumental variable” evolved

28 pivotal of 96 papers this map ranked · 6 links drawn here, all quote-verified · the full 23 are in the evidence

Instrumental variables evolved from a classical econometric device for handling endogeneity in linear simultaneous equations into a multifaceted methodological ecosystem spanning nonparametric identification, high-dimensional settings, machine learning integration, and increasingly sophisticated treatments of violations and robustness.

▶extends · built on▶narrows · specialised▶migrates · jumped fieldsturning pointthe arrow points at the newer paper, and names what it did to the older one’s idea

Marked at both ends of the timeline: the oldest and the newest paper in this map that defines the term, 2005 and 2025. That is where this map's reading stops, not where the term's story does. Work outside those years may exist, and this map has not read it.

Read a thread as an account

Classical IV foundations and refinement12 papers›High-dimensional and sparse IV methods11 papers›Nonparametric and semiparametric IV models13 papers›IV with heterogeneous treatment effects and causal mechanisms12 papers›IV validity, violations, and sensitivity analysis21 papers›Specialized IV applications and domain extensions30 papers›

The evidence →every typed relationship and the proof behind each What this map is made of →its own account, figure by figure: what was read, what is verified, and what rests on this tool’s reading

Take it to your draftevery thread, in order, with the quotes and the citationsMarkdown BibTeX

Drafted automatically from the papers’ own words. Nobody has edited this map by hand since. If anyone does, the change will be recorded, along with who made it. This map covers only the papers it read, all of them from arXiv. Reading more, from more places, would add threads, and each one would arrive with its own evidence.