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..
Photo 6: Form the front of the step. Set 6 x 8-in. wall stone into a 3-in. bed of sand to form the step. Settle and level the stones with a rubber mallet or a hammer and block of wood. Then fill behind the step stones with packed sand and set the path stones even with the top of the step.