Practice Diffusion
通过历史分析和民族志研究冲浪这一本土实践的扩散过程，发现实践并非被全盘采纳，而是通过编码和转置等机制在不同文化和国家中重新涌现，揭示了实践演化的权力动态和再生产形式。
Abstract Diffusion is traditionally examined at a macro level, measured by adoption (e.g., sales), or at a micro level, assessed by consumer characteristics (e.g., adopter types). We address diffusion at a meso level focusing on how a practice disseminates across extended time and cross-cultural and cross-national space. We conduct an historical analysis and ethnographic inquiry of the dispersion of an indigenous practice, surfing, and the consequences of practice diffusion on practice reproduction. Our data suggest practice diffusion is not the wholesale adoption of a practice. Rather, a practice emerges across diverse cultural and national contexts through adaptation, fueled by processes of codification and transposition. We find that the movement of practice elements (meanings, materials, and competences) and their dynamic linkages (transposition, codification, and adaptation) enable a practice to (re)emerge across broad historic epochs and complex sociocultural landscapes. This study reveals how a practice evolves through shifts in power between practice carriers and noncarriers and results in distinct forms of reproduction (demarcation, imitation, acculturation, and innovation) that can mask the cultural genealogy of a practice. The continual maintenance and evolution of a practice depend on its strength of alignment and embeddedness within systems of practices that make up the social fabric of everyday life.