Resources for the Future Pizer and Kopp. 3. cost to the economy.5 This is the notion of cost most often described by economists (e.g., Harberger 1971; Diamond and Mirrlees 1971). Defining and estimating Ci ()az, is far from trivial.
For stepping stones that are going to see a lot of use, you should consider using reinforced concrete so that your stepping stones are more durable. This type of concrete also sells at most hardware stores, often under the names gravel mix reinforced or fiber reinforced premixed concrete..
Concrete Stair Treads. Our Concrete Stair Treads are wet poured with high strength Cement, then vibrated to consolidate the concrete. These Step Treads are steel reinforced for extra strength. This process produces a Stair Tread that is very strong. These stair treads are used as the solid concrete steps for mobile homes entrances, and also in many commercial applications. Delivery is available â Nationwide 6 days a week.