Knickerbocker's theory does not explain why the first firm in an oligopoly decides to undertake FDI rather than to export or license. (Hills, 2008) also suggested that the imitative theory does not address the issue of whether FDI is more efficient than exporting or licensing for expanding abroad.
Isometrically, the lower back, the upper back, the abdominals, the trunk muscles, the costal muscles, and the shoulders and arms are all essential to the exercise and thus are trained when squatting with the proper form.
How low you go when you squat determines which muscles you'll target. Deep squats, in which your hips descend below your knees, focus on the glutes. Squatting to 90 degrees targets the quadriceps more. Because the hamstrings play a stabilizing role, squat depth doesn't affect them.