Iterative Hierarchical Clustering (IHC)

Provides a set of tools to i) identify geographic areas with significant change over time in drug utilization, and ii) characterize common change over time patterns among the time series for multiple geographic areas. For reference, see below: 1. Song, J., Carey, M., Zhu, H., Miao, H., Ram´ırez, J. C., & Wu, H. (2018) 2. Wu, S., Wu, H. (2013) 3. Carey, M., Wu, S., Gan, G. & Wu, H. (2016) .