Thanks for the link, Jim.
Of course, advances in bullet design that make the 9 Luger more effective make larger calibers even more effective -- if one is willing to pay the price in more recoil and less capacity.
The way I look at it, the .45 Auto is the man-stopping gold standard of military sidearms -- with ball ammo it will drill 0.45-inch wide holes having potentially lethal, greater than 12 inches, penetration. With today's well-designed premium JHP rounds in a 9 Luger one can get potentially lethal penetration with a bullet that expands to 0.85 inch in diameter. Thus, the 9 Luger offers better-than-gold-standard performance with less recoil and roughly twice the capacity. And as a bonus, the ammo is cheaper.