Hong Kong study finds AI search answers can favor big firms

University of Hong Kong researchers Xing Hu and Jitong Yao say generative AI is emerging as a new market gateway, shaping which service providers consumers see first. Their audit of 36,000 AI answers across 10 industries found visibility is highly concentrated, with large firms far more likely to appear prominently than smaller rivals.

Why it matters: - Generative AI search is increasingly influencing the earliest stage of consumer choice by deciding which firms appear inside a short synthesized answer. - The shift could reshape online competition because businesses are now competing not only for search rankings and clicks, but also for inclusion in AI-generated responses. - For smaller firms, online discoverability may depend more on the quality, consistency and verifiability of public information than on traditional SEO alone.

What happened: - University of Hong Kong researchers Xing Hu and Jitong Yao released new research on how generative AI search affects the discovery of service providers. - The study audited 36,000 AI-generated answers across 10 service industries, four model families, 200 query scenarios and 45 observation rounds. - The research team built 260,372 deduplicated answer-firm visibility records and identified 7,250 verified firm entities in AI-generated service recommendations. - Jitong Yao said the challenge for small businesses is becoming answerable to AI systems, not just doing digital marketing.

The details: - The study says generative AI answers act as a new market gateway by compressing many options into a short response. - The researchers wrote that generative search does not simply retrieve information and instead constructs a representation of the market. - Visibility in AI answers was highly concentrated, with a cumulative Gini coefficient of 0.888. - The top 1% of firms captured 45.1% of total visibility. - The top 5% of firms captured 73.7% of total visibility. - The top 10% of firms captured 84.0% of total visibility. - Early visibility advantages tended to stick. - Among firms in the top visibility group early in the observation period, 85.6% remained there later. - Only 1.61% of firms outside the early top group later moved into it. - Large firms had an average cumulative visibility score of 17.57. - Small and medium-sized firms had an average cumulative visibility score of 2.09. - Large firms also appeared in top answer positions more often, with a top-position rate of 27.6%. - Small and medium-sized firms had a top-position rate of 6.14%. - The researchers say the pattern does not prove intentional exclusion of smaller businesses. - The study points instead to a structural tendency for AI systems to favor firms with clear public information, consistent naming, structured profiles, third-party references and stronger digital footprints. - The study defines “answerability” as the extent to which a firm can be recognized, cross-checked and turned into a credible answer by an AI system.

Between the lines: - The research suggests AI search may be creating a new form of gatekeeping at the answer layer, where visibility is shaped by data quality and digital footprint before a consumer ever clicks a link. - That could widen the gap between large firms with established online trails and smaller firms that are harder for AI systems to verify. - The findings also broaden the policy debate beyond bias and misinformation to include which firms are included, which are omitted and how AI systems justify recommendations.

What's next: - The researchers say future AI search governance should examine inclusion and omission in AI-generated answers, not only ranking fairness. - Policymakers may also need to consider whether smaller providers have realistic ways to become visible to generative AI systems. - The study adds to wider discussions about generative AI, platform governance, small business digitization and consumer decision-making. - The researchers argue that future online competition may depend on being searchable and answerable.