Railroads: Rates and Regulations.

Land Use Regulations and Fertility Rates

Previous literature has shown that land use regulations influence where people choose to live within the U.S. by impacting housing prices. In this paper, we study the impact of these same regulations on another component of population growth, fertility rates. First, we employ a dataset on the stringency of land restrictions using court based measures created by Ganong and Shoag (2017). We add t...

Railroads and American Law

Railroads and American Economic Growth : A

This paper examines the historical impact of railroads on the American economy, with a focus on quantifying the aggregate impact in the agricultural sector in 1890. Expansion of the railroad network may have affected all counties directly or indirectly — an econometric challenge that arises in many empirical settings. However, the total impact on each county is captured by changes in that count...

Zigzags, Railroads, and Knots in Fullerenes

Two connections between fullerene structures and alternating knots are established. Knots may appear in two ways: from zigzags, i.e., circuits (possibly self-intersecting) of edges running alternately left and right at successive vertices, and from railroads, i.e., circuits (possibly self-intersecting) of edge-sharing hexagonal faces, such that the shared edges occur in opposite pairs. A z-knot...

A Delay Estimation Technique for Single and Double-track Railroads

To route and schedule trains over a large complex network can be computationally intensive. One way to reduce complexity could be to “aggregate” suitable sections of a network. In this paper, we present a simulation-based technique to generate delay estimates over track segments as a function of traffic conditions, as well as network topology. We test our technique by comparing the delay estima...