For AEIdeas, Mark J. Perry writes: There’s been a lot of attention paid recently to the issue of “campus sexual assaults” and some of the media including the Washington Post and MSNBC have referred to it as an “epidemic.” Doesn’t the term “epidemic” suggest that there is a widespread and growing number of campus sexual assaults? If so, the crime data from at least one major college campus — the University of Michigan — don’t support the term “epidemic” and in fact suggest the exact opposite – a declining trend in sexual assaults, both on and off campus, and for assaults reported to both police and university offices.
“sexual assaults at UM has been trending downward for the last decade”
The chart above shows the annual number of sexual assaults at the University of Michigan-Ann Arbor from their annual crimes reports, like this most recent one. It should be noted that the UM crime reports include sexual assaults that took place: a) on-campus, b) off campus (including out of state) and c) on public property. Further, it includes sexual assaults reported to: a) the University of Michigan Campus Police Department, b) other police departments and c) non-police organizations like the UM Sexual Assault Prevention and Awareness Center. Therefore, it’s a pretty comprehensive report that covers off-campus sexual assaults and assaults not reported to campus police, but to another police department or to a university office or official – in contrast to some universities that apparently only report sexual assaults on campus and only to the campus police.
“…the downward trend in sexual assaults at UM is consistent with the downward trend in the national incidence of rape, which has fallen by 45% over the last 20 years…”
As the chart above shows, the number of “campus” sexual assaults at UM has been trending downward for the last decade, and in 2012 (most recent year available) the number of sexual assaults (34) was about half the numbers in 2004 (64), 2005 (65) and 2006 (65). Read the rest of this entry »
For AEIdeas, Mark J. Perry writes: The chart above shows the combined daily oil output in America’s three most productive oil fields — the Bakken in North Dakota, the Eagle Ford Shale in south-central Texas and the Permian Basin in west Texas — from January 2007 to June 2014, based on estimates released this week by the EIA. From combined output of 1 million barrels of oil per day (bpd) in 2007, total crude oil production in those three oil fields will top 4 million barrels in June, based on drilling rigs data and EIA estimates of changes in production from existing wells.
Oil production for each of America’s three super-giant elite oil fields are displayed separately in the chart below, with June production levels estimated at 1.068 million bpd in the Bakken, 1.42 million bpd in the Eagle Ford Shale, and 1.53 million bpd in the Permian Basin. Read the rest of this entry »
Mark J. Perry writes: Everybody’s featuring their “graphs and charts of the year,” like The Atlantic and the Washington Post (be sure to see Vice-President Joe Biden’s “Graph of the Year” on Amtrak ridership). Well, the chart above could perhaps qualify as the “chart of the century” because it illustrates one of the most remarkable achievements in human history: the 80% reduction in world poverty in only 36 years, from 26.8% of the world’s population living on $1 or less (in 1987 dollars) in 1970 to only 5.4% in 2006. (Source: The 2009 NBER working paper “Parametric Estimations of the World Distribution of Income,” by economists Maxim Pinkovskiy (MIT) and Xavier Sala-i-Martin (Columbia University).
What accounts for this great achievement that you never hear about? AEI president Arthur Brooks explains in the video above, summarized here:
The state pumped 2.7 million barrels of crude per day during September, the highest monthly average since at least January 1981. Texas oil production had been declining since the U.S. Energy Information Administration’s monthly record-keeping began in 1981. But the tide abruptly turned in 2008 with the beginning of the shale oil and gas boom.
For 25 straight months, the state’s oil production rate has increased by more than 25 percent year-over-year, notes economist Mark J. Perry, a professor at the University of Michigan’s School of Management.