Latent trait measures of agency attributes described in Anthony M. Bertelli, Dyana P. Mason, Jennifer M. Connolly, and David A. Gastwirth. 2013. “Measuring Agency Attributes with Attitudes Across Time: A Method and Examples Using Large-Scale Federal Surveys,” Journal of Public Administration Research and Theory, are provided in a Microsoft Excel worksheet here. A codebook is available in PDF format here. The article can be accessed via the journal website here.