Star formation in molecular clouds is clumpy, hierarchically subclustered. Fractal structure also emerges hydro-dynamical simulations of star-forming clouds. Simulating the realistic star clusters with a computational challenge, considering that only statistically averaged results large batches are reliable, due to chaotic nature gravitational N-body problem. While sets initial conditions for r...

The Energy Star program is the most prominent energy efficiency policy in the United States. Using data on residential clothes washers, we examine the price premium for the Energy Star label. A standard hedonic analysis reveals a number of confounding factors, including a large price premium for front loading washers. A regression discontinuity design reveals no significant price premium. Addit...