We simply do not have much well-documented history of big financial crises to examine, leaving econometricians vulnerable to serious error, despite studying time series that are typically no more than a few decades long.
Sencillamente no contamos con mucha historia bien documentada de las grandes crisis financieras para examinar, lo que deja a los econometristas vulnerables a cometer graves errores, a pesar de estudiar series temporales que típicamente solo se extienden por unas pocas décadas.