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.
While every type of squat will do wonders for your lower body, each variation emphasizes different muscles, such as your hamstrings or glute medius (side butt). Hit a few variations every week and you'll get the benefits of all of them, he says. Start with these three squats to get a strong, firm butt.