Communication efficiency

Communication Efficiency is a metric that measures the effectiveness at which a state can exert its will from its capital to a given province. It represents at what cost and at which capacity a state can move its troops and taxes to and from the provinces. It is measured by finding a minimum cost path from the capital to every provinces. If the cost of its minimum cost path is high, then a given province will receive bad CE. If not, it will receive good CE. A path is a set of connected provinces that starts from the capital and ends at the destination. A province that is further down the path is always worse off than a province that comes before. Cost of traversing a province is determined by factors such as terrain cost, road reduction on terrain cost, loading cost, harbourage reduction on loading cost, absolute distance between two provinces, and river connections. A province is traversed either through river connection, sea connection, or through land connection.