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..
However, brick will set off concrete or pebble-type stones to perfection, and will last for years with little fuss or muss. Bits and pieces of flagstone laid out in mosaic-like patterns between round or square stepping stones will also add a nice focal point to a stepping stone path.