Past AIX Surveys and Products

AIX report and data archives of preceding years

  • AIX Reports and Data Sets
    • Most recent reporting period: Fiscal Year 2020-21 (released July 2023)
    • AIX reports (PDF) and data sets (Excel) from the current and past years are available at no charge to all AIX liaisons and state park officials. They are also available for other users at no or a modest charge depending on the user type. Please contact the Project PI, Dr. Yu-Fai Leung (Leung@ncsu.edu) for more details.
  • AIX Infographics
    • Colored PDF of “AIX Report at a Glance” infographics (since the FY 2019-20 AIX survey cycle) [Download Link]

Other AIX products

Further analyses based on AIX data from multiple years; developed by Project co-PI Dr. Jordan Smith (jordan.smith@usu.edu) since July 2013, and Dr. Chris Siderelis prior to June 2013.

AIX outlook letters

Scholarly publications

Important Disclaimer: The following scholarly publications utilize the AIX data sets, but the analyses were performed by the authors independently of the project sponsor, NASPD. Therefore, the topic selection, methodology, results, discussion, conclusions, and/or other views expressed by the authors in these papers do not represent the views and positions of the NASPD. Other academic researchers in any discipline are also encouraged to utilize the AIX data for their own scholarly analyses that contribute to our collective understanding of America’s state park system in relation to other issues and trends. Please contact the Project PI, Dr. Yu-Fai Leung (Leung@ncsu.edu) for further details.

  • Smith, J. W., Wilkins, E., & Leung, Y.-F. (2019). Attendance trends threaten future operations of America’s state park systems. Proceedings of the National Academy of Sciences of the USA, 116(26), 12775-12780. [Abstract]
  • Smith, J. W., & Siderelis, C. (2017). Temporal trends in the operating inefficiencies of U.S. state park systems. Journal of Outdoor Recreation and Tourism, 18, 105-112. [Abstract]
  • Smith, J. W., Leung, Y.-F., Seekamp, E., Walden-Schreiner, C., & Miller, A. (2015). Projected impacts to the production of outdoor recreation opportunities across state park systems in the U.S. due to the adoption of a domestic climate change mitigation policy. Environmental Science and Policy, 48, 77-88. [Abstract]
  • Siderelis, C., & Smith, J. W. (2013). Ecological settings and state economies as factor inputs in the provision of outdoor recreation. Environmental Management, 52(3), 699-711. [Abstract]
  • Siderelis, C., Moore, R. L., Leung, Y.-F., & Smith, J. W. (2012). A nationwide production analysis of state park attendance in the United States. Journal of Environmental Management, 99, 18-26. [Abstract]

Conference presentations

  • Conference Presentations (contact Project PI for more information)
    • Leung, Y.-F., Miller, A., Walden-Schreiner, C., Smith, J., & Ledford, L. (2017). Long-term monitoring of state park operations in the U.S.. Poster presented at the 2017 International Symposium on Society and Resource Management (ISSRM) Conference.
    • Leung, Y.-F., Smith, J. W., & Miller, A. (2014). U.S. State Parks Visitation Data from the NASPD Annual Information Exchange Project.Invited paper presented at the 2014 IUCN World Parks Congress; Sydney, NSW, Australia.
    • Miller, A. & Leung, Y.-F. (2013). The role of state parks in providing recreation opportunities: .Visitation trends in difficult economic times. Poster presented at the 2013 George Wright Society Conference on Parks, Protected Areas, and Cultural Sites; Denver, CO.
    • Leung, Y.-F., Siderelis, C., Miller, A., & Walden-Schreiner, C. (2012). A long-term state park operations database for academic research: Examples and suggestions. Poster presented at the 34th Southeastern Recreation Research Conference; Auburn, AL.