"Homeless Networks: Testing Peer and Homed Networks Against Location Choice"

This paper examines the location choices of homeless people in Osaka City, and .nds them concentrated because of homeless networks. The paper also shows that different types of homeless networks operate in two different homeless groups: (1) peer networks that provide a social tie inside homeless communities are observed in groups that had not had work experience in the day labor market; (2) homed networks that provide a social tie outside homeless communities affect location choice in the expected way, although the effect is statistically insigni.cant in groups that had worked in the day labor market.

"Homeless Networks and Geographic Concentration: Evidence from Osaka City"

Homeless people in Osaka City are geographically concentrated. The purpose of this paper is to examine this geographic concentration by focusing on homeless networks. The data we use contain information on Osaka City.s homeless population by census blocks. The estimated results of a spatial autoregressive model with autoregressive disturbances show that the homeless network is signi.cantly positive across census blocks. Networks exist in a homeless society.

The Physics of Bodily Tides in Terrestrial Planets, and the Appropriate Scales of Dynamical Evolution

Any model of tides is based on a specific hypothesis of how lagging depends on the tidal-flexure frequency. For example, Gerstenkorn (1955), MacDonald (1964), and Kaula (1964) assumed constancy of the geometric lag angle, while Singer (1968) and Mignard (1979, 1980) asserted constancy of the time lag. Thus, each of these two models was based on a certain law of scaling of the geometric lag. The actual dependence of the geometric lag on the frequency is more complicated and is determined by the rheology of the planet. Besides, each particular functional form of this dependence will unambiguously fix the appropriate form of the frequency dependence of the tidal quality factor, Q. Since at present we know the shape of the dependence of Q upon the frequency, we can reverse our line of reasoning and single out the appropriate actual frequency-dependence of the angular lag. This dependence turns out to be different from those employed hitherto, and it entails considerable alterations in the time scales of the tide-generated dynamical evolution. Phobos' fall on Mars is an example we consider.Comment: arXiv admin note: substantial text overlap with arXiv:astro-ph/060552

Asset price indices for Japanese art auction market: An application to the Japanese artist

This research is one of the few to analyzed a Japanese art auction market. We found the hedonic price index of artworks in Japan’s art auction market, between 2006 and 2019. Considering the sample selection bias in the auction and the price index measurement by the traditional hedonic time dummy model of log-price, we presented the estimation of the hammer price by the exponential type II Tobit model. Using the difference between the conditional expectation of the logarithmic price, a new price index that takes into account the variation of selection bias was defined. Art price index by the ordinary least squares estimation without considering the sales selection has a negative bias in the Japanese art auction market

Unsolved problems in the lowermost mantle

Many characteristics of D '' layer may be attributed to the recently discovered MgSiO3 post-perovskite phase without chemical heterogeneities. They include a sharp discontinuity at the top of D '', regional variation in seismic anisotropy, and a steep Clapeyron slope. However, some features remain unexplained. The seismically inferred velocity jump is too large in comparison to first principles calculations, and the sharpness of the discontinuity may require a chemical boundary. Chemical heterogeneity may play an important role in addition to the phase transformation from perovskite to post-perovskite. Phase transformation and chemical heterogeneity and the attendant changes in physical properties, such as rheology and thermal conductivity, are likely to play competing roles in defining the dynamical stability of the D '' layer. Revealing the relative roles between phase transition and chemical anomalies is an outstanding challenge in the study of the role of D '' in thermal-chemical evolution of the Earth

Homeless Networks: Testing Peer and Homed Networks Against Location Choice.

This paper examines the location choices of homeless people in Osaka City, and finds them concentrated because of homeless networks. The paper also shows that different types of homeless networks operate in two different homeless groups: (1) peer networks that provide a social tie inside homeless communities are observed in groups that had not had work experience in the day labor market; (2) homed networks that provide a social tie outside homeless communities affect location choice in the expected way, although the effect is statistically insignificant in groups that had worked in the day labor market

Decomposition Analysis of the Household Migration

The purpose of this research is to show the trends and feature of household migration using the microdata in Housing and Land Survey of Japan (at 1993, 1998, 2003, 2008). We screen the effective observation data and examine the variation of the attribute of moving or staying household with regard to age, type of employment, income, housing tenure, residence performance and so on. We characterize the variation in the ratio of household mobility through the decomposition the variation of age distribution (VAD) and the variation of propensity to move (VPM). Drop of the ratio of household mobility is dominated by VAD on the basis advancing aging society. There is the cases that VPM are increasing even if the ratio of household mobility is declining as a whole tendency