Spatial Competition and Demand: An Application to Motion Pictures

This paper provides a rich assessment of the demand characteristics for movie theatre attendance in two major metropolitan markets and provides strong support for the importance of spatial characteristics in empirical demand analysis. We provide evidence of the usual competitive effect of location on an exhibitor’s demand but also find evidence of a clustering effect: when a group of theatres is in close proximity to each other, their proximity generates additional demand for all theatres within the cluster. The demographic evidence suggests that movie attendance is a normal good but does not support the commonly held industry view that young male viewers drive demand. Finally, we show that attendance at a particular theatre is affected by both the theatre’s attributes and the attributes of nearby competing theatres. The attributes we include cover physical features and theatre type.

Product Differentiation and Film Programming Choice: Do First-Run Movie Theatres Show the Same Films?

We present an empirical analysis of product differentiation using a rich new dynamic panel data set on film programming choice in a major U.S. metropolitan motion-pictures exhibition market. These data allow us to investigate the determinants of strategic product differentiation in a multicharacteristics space. We find evidence of stability in the degree of product differentiation over time, but also find that the degree of product differentiation between theatre pairs reflects a balance between strategic concerns and contractual constraints. Similarity in one dimension is offset by differentiation in others. Finally, we find that theatres under common ownership make more similar programming choices than theatres with different owners.

The Psychopathology of Everyday Athens: Euripides on the Freudian Couch

Freud’s theories suggest that authors often describe aspects of their own self-image, or their interpretation of the people around them, in individual characters or themes. Using this idea, I will perform a psychological study of characters and themes in four of Euripides’ plays, the Medea, Bacchae, Hecuba, and Trojan Women, then apply Freud’s Dream Work theory to conclusions about the plays in an effort to open a window into the psychology of Euripides himself

Study of controlled diffusion stator blading. 1. Aerodynamic and mechanical design report

Pratt & Whitney Aircraft is conducting a test program for NASA in order to demonstrate that a controlled-diffusion stator provides low losses at high loadings and Mach numbers. The technology has shown great promise in wind tunnel tests. Details of the design of the controlled diffusion stator vanes and the multiple-circular-arc rotor blades are presented. The stage, including stator and rotor, was designed to be suitable for the first-stage of an advanced multistage, high-pressure compressor

Genetic Suppression of Basement Membrane Defects in Caenorhabditis elegans by Gain of Function in Extracellular Matrix and Cell-Matrix Attachment Genes.

Basement membranes are extracellular matrices essential for embryonic development in animals. Peroxidasins are extracellular peroxidases implicated in the unique sulfilimine cross-links between type IV basement membrane collagens. Loss of function in the Caenorhabditis elegans peroxidasin PXN-2 results in fully penetrant embryonic or larval lethality. Using genetic suppressor screening, we find that the requirement for PXN-2 in development can be bypassed by gain of function in multiple genes encoding other basement membrane components, or proteins implicated in cell-matrix attachment. We identify multiple alleles of let-805, encoding the transmembrane protein myotactin, which suppress phenotypes of pxn-2 null mutants and of other basement membrane mutants such as F-spondin/spon-1 These let-805 suppressor alleles cause missense alterations in two pairs of FNIII repeats in the extracellular domain; they act dominantly and have no detectable phenotypes alone, suggesting they cause gain of function. We also identify suppressor missense mutations affecting basement membrane components type IV collagen (emb-9, let-2) and perlecan (unc-52), as well as a mutation affecting spectraplakin (vab-10), a component of the epidermal cytoskeleton. These suppressor alleles do not bypass the developmental requirement for core structural proteins of the basement membrane such as laminin or type IV collagen. In conclusion, putative gain-of-function alterations in matrix proteins or in cell-matrix receptors can overcome the requirement for certain basement membrane proteins in embryonic development, revealing previously unknown plasticity in the genetic requirements for the extracellular matrix

Metal-enriched galactic outflows shape the mass-metallicity relationship

The gas-phase metallicity of low-mass galaxies increases with increasing stellar mass ($M_\ast$) and is nearly constant for high-mass galaxies. Theory suggests that this tight mass-metallicity relationship is shaped by galactic outflows removing metal-enriched gas from galaxies. Here, we observationally model the outflow metallicities of the warm outflowing phase from a sample of seven local star-forming galaxies with stellar masses between 10$^{7}$-10$^{11}$ M$_\odot$. We estimate the outflow metallicities using four weak rest-frame ultraviolet absorption lines, the observed stellar continua, and photoionization models. The outflow metallicity is flat with $M_\ast$, with a median metallicity of $1.0\pm0.6$ Z$_\odot$. The observed outflows are metal-enriched: low and high-mass galaxies have outflow metallicities 10-50 and 2.6 times larger than their ISM metallicities, respectively. The observed outflows are mainly composed of entrained ISM gas with at most 22% of the metals directly coming from recent supernovae enrichment. The metal outflow rate shallowly increases with $M_\ast$, as $M_\ast^{0.2 \pm 0.1}$, because the mass outflow rate shallow increases with $M_\ast$. Finally, we normalize the metal outflow rate by the rate at which star formation retains metals to calculate the metal-loading factor. The metal-loading factor inversely scales with $M_\ast$. The normalization and scaling of the metal-loading factor agree with analytic expressions that reproduce observed mass-metallicity relations. Galactic outflows fundamentally shape the observed mass-metallicity relationship.Comment: 15 pages, 7 figures, Accepted for publication in MNRA