prisoner-call-limits : prisoner telephone limits

1 | Estimated additional revenue from raising BOP prisoner telephone call ceiling | ||||
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2 | For related discussion, see | ||||

3 | http://purplemotes.net/2011/09/19/setting-limits-on-prisoners-telephone-calling/ | ||||

4 | Excel version of spreadsheet (which shows formulas and can be modified) available here: | ||||

5 | http://galbithink.org/prisoners/prisoner-call-limits.xls | ||||

6 | |||||

7 | source / notes | ||||

8 | prisoners in BOP facilities | 177,859 | BOP, weekly population report, BOP facilities | http://www.bop.gov/locations/weekly_report.jsp | |

9 | |||||

10 | prisoner call cost: | ||||

11 | local debit call cost per minute | $0.06 | GAO (2010) p. 15 | ||

12 | long-distance call cost per minute | $0.23 | GAO (2010) p. 15 | ||

13 | long-distance call share | 84% | GAO (2010) p. 15 | ||

14 | ave cost per minute | $0.20 | calculated | ||

15 | |||||

16 | current limit | 300 | GAO (2010) p. 15 | ||

17 | share at current limit | 25% | GAO (2010) p. 18 | ||

18 | |||||

19 | GAO (2010): Bureau of Prisons: Improved Evaluations and Increased Coordination Could Improve Cell Phone Detection | http://www.gao.gov/products/GAO-11-893 | |||

20 | |||||

21 | |||||

22 | |||||

23 | exponential model parameter | 0.004620981204 | model estimate | ||

24 | new limit | 500 | hypothetical | ||

25 | |||||

26 | ave. minutes | share | calculations | ||

27 | between current and new limits | 385 | 15.1% | ||

28 | at new limit | 500 | 9.9% | ||

29 | |||||

30 | additional revenue | $1,176,995 | |||

31 | |||||

32 | |||||

33 | |||||

34 | exponential model test | ||||

35 | |||||

36 | BOP prisoner calling distribution in 1999 | OIG, Criminal Calls (1999) | http://www.justice.gov/oig/special/9908/callsp4.htm#Field | ||

37 | less than 300 mins per month | 72% | |||

38 | between 300-999 minutes per month | 24% | |||

39 | 1000 to 4000 minutes per month | 4% | |||

40 | |||||

41 | exponential model parameter | 0.004243218919 | |||

42 | est. between 300-999 mins | 27% |