Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

The Lagrange Multiplier (LM) test is one of the principal tools to detect ARCH and GARCH effects in financial data analysis. However, when the underlying data are non-normal, which is often the case ...

This is a preview. Log in through your library . Abstract This paper considers adaptive estimation in nonstationary autoregressive moving average models with the noise sequence satisfying a ...