We propose a novel approach to measure the value that shareholders assign to financial flexibility. In contrast to existing proxies for financial constraints, our measure is market-based, forward-looking and not directly influenced by past financial decisions. We find that firms for which...

We study graphene nanoribbons (GNRs) with armchair edges in the presence of Rashba spin- orbit interactions (RSOI). We impose the boundary conditions on the tight binding Hamiltonians for bulk graphene with RSOI by means of a sine transform and study the influence of RSOI on the spectra and the...