343 research outputs found
Structure and temporal change of the credit network between banks and large firms in Japan
We present a new approach to understanding credit relationships between
commercial banks and quoted firms, and with this approach, examine the temporal
change in the structure of the Japanese credit network from 1980 to 2005. At
each year, the credit network is regarded as a weighted bipartite graph where
edges correspond to the relationships and weights refer to the amounts of
loans. Reduction in the supply of credit affects firms as debtor, and failure
of a firm influences banks as creditor. To quantify the dependency and
influence between banks and firms, we propose a set of scores of banks and
firms, which can be calculated by solving an eigenvalue problem determined by
the weight of the credit network. We found that a few largest eigenvalues and
corresponding eigenvectors are significant by using a null hypothesis of random
bipartite graphs, and that the scores can quantitatively describe the stability
or fragility of the credit network during the 25 years
Response of Firm Agent Network to Exogenous Shock
This paper describes an agent-based model of interacting firms, in which
interacting firm agents rationally invest capital and labor in order to
maximize payoff. Both transactions and production are taken into account in
this model. First, the performance of individual firms on a real transaction
network was simulated. The simulation quantitatively reproduced the cumulative
probability distribution of revenue, material cost, capital, and labor. Then,
the response of the firms to a given exogenous shock, defined as a sudden
change of gross domestic product, is discussed. The longer tail in cumulative
probability and skewed distribution of growth rate are observed for a high
growth scenario.Comment: 8 pages, 9 figures, APFA
Adalimumab Monotherapy in a Patient with Psoriatic Arthritis Associated with Chronic Renal Failure on Hemodialysis: A Case Report and Literature Review
We report a patient with psoriatic arthritis (PsA) who was successfully treated with adalimumab even while under hemodialysis therapy for associated chronic renal failure. Flow cytometry of circulating lymphocytes revealed an obvious decrease in both Th1 and Th17 cells after starting adalimumab. The latter returned to the pretreatment level in the course of adalimumab therapy, while the former did not. Adalimumab is a potent therapeutic option for PsA patients with chronic renal failure on hemodialysis, and Th1 in peripheral blood may reflect the disease activity
Superstatistics of Labour Productivity in Manufacturing and Nonmanufacturing Sectors
Labour productivity distribution (dispersion) is studied both theoretically
and empirically. Superstatistics is presented as a natural theoretical
framework for productivity. The demand index is proposed within this
framework as a new business index. Japanese productivity data covering
small-to-medium to large firms from 1996 to 2006 is analyzed and the power-law
for both firms and workers is established. The demand index is
evaluated in the manufacturing sector. A new discovery is reported for the
nonmanufacturing (service) sector, which calls for expansion of the
superstatistics framework to negative temperature range.Comment: 15 pages, including 9 figure
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