"Discover the intricacies of holding companies, a staple of Gilded Age finance. Learn how they facilitated labor, promoted industrial growth, and fueled economic expansion. Explore APUSH Review Unit 6 Topic 7, examining the period 1865-1898. Understand how holding companies, pools, integrations, and interlocking directorates shaped the business landscape. Simplify the complex world of holding companies with our clear explanation."