Based on Lauren's skills and experience, she could charge a competitive hourly rate. Considering her education from Harvard Business School, a top-tier institution, and her expertise in business strategy, marketing, and management consulting, her rate is likely to be on the higher side. According to industry benchmarks, management consultants and business strategists with similar experience can earn $100-$200 per hour. However, given Lauren's Harvard pedigree and her skills in cross-functional team leadership, I estimate her hourly rate to be around $150.