Infante-Infante, J. (Juan)

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    Persistence in UK historical data on life expectancy
    (Springer, 2023) Infante-Infante, J. (Juan); Río, M. (Marta) del; Gil-Alana, L.A. (Luis A.); Caporale, G.M. (Guglielmo M.)
    This paper provides estimates of persistence in historical UK data on life expectancy applying fractional integration methods to both an annual series from 1842 to 2019 and a 5-year average from 1543 to 2019. This method is the most appropriate for our purposes since it is more general and fexible than the classical methods based on integer diferentiation. The results indicate that the former exhibits an upward trend and is persistent but mean reverting; the same holds for the latter, though its degree of persistence is higher. Similar results are obtained for the logged values. On the whole, this evidence suggests that the efects of shocks to the series are transitory though persistent, which is useful information for policy makers whose task is to take appropriate measures to increase life expectancy.
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    Energy prices in Europe. Evidence of persistence across markets
    (Elsevier, 2023) Infante-Infante, J. (Juan); Martin-Valmayor, M. (Miguel); Gil-Alana, L.A. (Luis A.)
    This paper deals with the behavior of energy price changes and how their shocks exert an impact on suppliers and consumers in different markets. For this purpose, a fractional integration model is used to evaluate the persistence and mean reversion in prices across the major European markets (Germany, France, Italy, UK, Spain). We compare the results with other major players as the US and Japan, to understand, first, if the European behavior is different, and second, if geopolitical shocks that are affecting this market are expected to be permanent. Empirical results show evidence of mean reversion properties in European prices, though some minor differences arise from market to market that apparently, are not associated with the energy generation strategies followed by each country. Thus, it will likely be expected following the current energy shocks the series will recover due to natural market forces, without the need for additional policies.