Changes in version 2025-09-02 - Updated USincarcerations Changes in version 2025-08-27 - Updated "USGDPpresidents" Changes in version 2022-10-13 - Updated "terrorism" to 2020. Changes in version 2022-07-01 - Replaced non-breaking spaces that used Latin-1 encoding with " " in 4 "demoFiles/NIPA6.16*.csv" files, because the said non-breaking spaces were not valid in UTF-8 and were rejected by a development version of R. Changes in version 2022-06-14 - Adds new datasets "USnewspapers"" and "USPS"" (US Postal Service) while adding federal government budget data to "USGDPpresidents". Changes in version 2020-11-01 - Deletes ~demoFiles/*_data.xls, because they were used to test Ecfun::financialDataFiles and Ecfun::readFinancialDataFiles, and those two functions were removed, because they used gdata, which was not being maintained, and the work required to maintain them exceeded the current need of the maintainer. Changes in version 2020-02-08 - Adds variables popM, popYr, GDP_B, and GDPyr to data set "nuclearWeaponStates". Changes in version 2019-12-05 - Corrects the description of Crime$density to read, "hundreds of people per square mile" from "people per square mile". Thanks to Yungfong "Frank" Tang for identifying this error and confirming the needed correction. Changes in version 2019-11-05 - Adds variable 'firstTestYr' to 'nuclearWeaponStates'. It also corrects an error in the 'Mroz' data set, in that "work" had the names of the levels incorrectly swapped. Changes in version 0.3-3 (2019-09-29) - Adds data set "nuclearWeaponStates", which might be used to model the probability distribution of the time to the next new nuclear weapon state.