This document discusses supply issues in tourist transport. It analyzes the tourism supply chain and the factors that affect supply, such as market structure. Tourism supply is complex as it involves many interconnected services. Supply is determined by the operating sectors in the industry like transportation, accommodation, food services, and attractions. Market structure models from economics, such as perfect competition, monopoly, oligopoly, and contestable markets, influence firms' pricing and output decisions. The supply chain can involve tourists directly purchasing services or purchasing packages through agents and tour operators.