I use Monte Carlo simulations, the jackknife and multiple forms of bootstrap to study a comprehensive sample 1309 instrumental variables regressions in 30 papers published journals American Economic Association. simulations based upon show that non-iid error processes highly leveraged regressions, both prominent features work, adversely affect size power IV tests, while increasing bias mean squ...

A total of 120 barrows (initial BW = 47.9 ± 3.6 kg; PIC 1050) were used in an 83-d study to determine the effects of dietary iodine value (IV) product (IVP) on growth performance and fat quality. Pigs were blocked by BW and randomly allotted to 1 of 6 treatments with 2 pigs per pen and 10 pens per treatment. Dietary treatments were fed in 3 phases and formulated to 3 IVP concentrations (low, me...