Regression modelEconometrics / time series

ARCH Model (Autoregressive Conditional Heteroskedasticity)

The ARCH model, introduced by Robert Engle in 1982, captures time-varying volatility in financial and macroeconomic time series. It models the conditional variance of today's error as a function of past squared errors, explaining why volatile periods cluster together — a phenomenon known as volatility clustering.

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Sources

  1. Engle, R. F. (1982). Autoregressive conditional heteroscedasticity with estimates of the variance of United Kingdom inflation. Econometrica, 50(4), 987–1007. DOI: 10.2307/1912773
  2. Engle, R. F. (2001). GARCH 101: The use of ARCH/GARCH models in applied econometrics. Journal of Economic Perspectives, 15(4), 157–168. DOI: 10.1257/jep.15.4.157

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Referenced by

ScholarGateARCH model (Autoregressive Conditional Heteroskedasticity Model). Retrieved 2026-06-04 from https://scholargate.app/tr/econometrics/arch-model