请修缮这段文字要求表达要清晰语法要准确。The historical of public service announcement has its inevitable conditions including economic support and cultural constraints The United States is the birthplace of public servic

The history of public service announcements is influenced by economic support and cultural constraints. The United States is considered the birthplace of modern public service announcements, with a mature concept of public service among citizens. Through a review of foreign literature databases such as the Journal of Advertising Research and Journal of Advertising, the author found that public service announcements are collectively known as PSA (Public Service Advertising or Public Service Announcement) and are positioned as public service advertisements (June Marchand & Sylvie Lavoie, 1998).

Academic research on public service announcements is primarily conducted by scholars in the field of communication. Foreign research on this topic focuses on two main areas. Firstly, research on public service announcements tends to focus on the micro perspective, including the creation, appeal, effect, persuasion strategy, and themes of public service announcements. For example, Schoenbachler and Denise D (1996) found that anti-drug public service announcements with social harm appeals are more effective than those with self-health appeals. Secondly, foreign research on public service announcements often revolves around specific cases or works, such as anti-drug campaigns, juvenile delinquency advertising, smoking cessation advertising, and environmental protection advertising. For instance, Yeung-Jo Kim (2006) used the theory of regulatory orientation to study the role of self-management goals in anti-adolescent smoking advertisements, concluding that such advertisements are more effective when they align with adolescents' self-management goals