Revenue is generated and used the money and try to maintain the value of the lands, rising, such as improving the road. If the local environment, poor management of land prices fall, there will be a local decrease in revenue.
The revenue and cost effective. And to maintain the value of the land increases, such as improved road conditions are not good, because if the local administration, local land prices fall to a revenue decline.
the income and cost effective. And try to maintain the value of land more, such as, road improvement, environment, because if the local bad management, land prices fall, local have income decreased.