Due to the overcrowding in prisons and detention centers by for-profit corporations, organizations such as Amnesty International, propose using alternatives such as reporting requirements, bonds, or the use of monitoring technologies. The questions often brought up with alternatives include whether they are effective or efficient. A study published by the Vera Institute attempts to answer this question by stating that when alternatives such as monitoring technologies were used, they found that 91% of the individuals appeared at their court date. The Institute recorded that the relative cost of using such alternatives has been estimated at $12 per day a relatively low price in comparison to the reported average cost of incarceration in the U.S., which has been priced at roughly $87.61 per day.