Apparently, it’s not a typo. In finance math, they just quote the absolute value of epsilon (because it is always negative). The equation presented doesn’t work regardless of whether or not they got the signs correct, because the logic behind it is wrong (epsilon and phi aren’t constants)
Apparently, it’s not a typo. In finance math, they just quote the absolute value of epsilon (because it is always negative). The equation presented doesn’t work regardless of whether or not they got the signs correct, because the logic behind it is wrong (epsilon and phi aren’t constants)
Huh. Well, that’s fun. Economists can eat my whole ass, those fuckers absolutely suck. Thanks for the info!