Atmospheric pollution in the ten most populated US cities. Evidence of persistence
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Lorenzo Bermejo, Luis A. Gil-Alana, Marta del Rio, Atmospheric pollution in the ten most populated US cities. Evidence of persistence, Heliyon, Volume 7, Issue 10, 2021, https://doi.org/10.1016/j.heliyon.2021.e08105.
The degree of persistence in daily PM25 and O3 in the ten most populated US cities, namely New York, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas and San Jose is examined in this work. We employ a methodology based on fractional integration, using the order of integration as a measure of the degree of persistence. Using data for the time period from January 1, 2019 to December 31, 2020, our results indicate that fractional integration and long memory f ...