My first instinct was to go top-down: start with global air passengers per year and work toward ad impressions and revenue.
Break down the market size by estimating the number of flights, passengers, and available ad inventory, then apply realistic pricing and fill rates. Use a top-down approach starting with global air travel data, then refine with assumptions about ad formats and targeting. Conclude with a sanity check against comparable ad markets.
Pro tip: Show awareness of the shift from traditional seatback screens to personal devices and Wi-Fi, and how that impacts ad inventory and pricing. Also, mention that in-flight advertising is often bundled with other airline revenue streams, so isolate only ad-specific revenue.
Clarify what 'in-flight advertising' includes: seatback screens, overhead bins, tray tables, Wi-Fi portals, and mobile apps. Specify whether it's global or a specific region, and if it's annual revenue.
Use global air travel statistics: ~100,000 flights per day, ~4 billion passengers annually. Segment by flight type (domestic vs. international, short-haul vs. long-haul) as ad inventory varies.
Estimate available ad slots: e.g., seatback screens (1 per passenger), Wi-Fi portal impressions (multiple per passenger), and physical placements. Calculate total annual impressions.
Use CPM rates for digital ads (e.g., $10-$50) and flat fees for physical ads. Apply a realistic fill rate (e.g., 50-70%) to get actual sold inventory.
Multiply impressions by CPM and fill rate to get total market size. Compare with known airline ancillary revenue or digital out-of-home ad markets to validate.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.