<prompt> Translate the following text to EnglishKama ilivyoelezwa hapo juu, wafanya utafiti wa matarajio ya akili, wakiongozwa na Robert Lucas, mshindi wa baadaye wa tuzo ya Nobel, walishindana na wazo kwamba serikali zinaweza kufanya chochote ili kupunguza ukosefu wa utulivu wa uchumi.  <response>: Equally important was an internal crisis of self- Rational expectations theorists, led by Chicagos future Nobelist Robert Lucas, challenged the whole idea that governments could do anything to mitigate macroeconomic instability. 