Examining longitudinal data over a period of four decades, Sharkey provides compelling arguments on how inequality clustered in a social setting can be addressed with a durable urban policy agenda.
An analysis of three decades of data from South Georgia shows that the seals are in decline again, with female numbers down by some 30% between 2003 and 2012.
The work, by Peter Korsten of the University of Edinburgh and colleagues, made use of two decades of data from an unmanaged population of Soay sheep that had been closely monitored on the Scottish island of Hirta.
While this is ideal, it would be logistically very difficult to implement in this study, particularly as the data collection span over a period of two decades and began at a time when retinal photography was not freely available as a clinical tool.
Our statistical option was motivated inter alia by the existence of official annual data for two decades (1989 2009).
In a review of three decades of survey data from nearly half a million participants, researchers found that men are more likely to demonstrate narcissistic behavior than women, regardless of generation or age.
In July, Brian D. Todd of the University of California, Davis, and colleagues released the results of an analysis of three decades of field data that documented the migration patterns of 10 species of amphibians at a natural wetland in South Carolina.
Harold T. Martin III, 54, was arrested in 2016 and detained after the FBI found that he had taken reams of sensitive files, including six full bankers boxes and 50 terabytes of data, to his home over a period of two decades.
Now, as users and national governments express increased frustration with that failure, the consequences of two decades of poor data collection and use practices have accumulated to what may be a breaking point.
Alongside the historical land data of almost two decades, the models helped researchers understand what could have happened if the land had never been developed for rubber plantations or if the plantations had been managed differently.
