93 research outputs found
Econometric Analysis of the Effects of Subsidies on Farm Production in Case of Endogenous Input Quantities
The effect of subsidies on farm production has been a major topic in agricultural economics for several decades. We present a new approach for analyzing the effects of different types of coupled and decoupled subsidies on farm production with econometric methods. In contrast to most previous studies, our approach is entirely based on a theoretical microeconomic model, explicitly allows subsidies to have an impact on input use, and takes linkages between the farm and the farm household into account.Agricultural and Food Policy, Productivity Analysis,
Econometric Analysis of the Effects of Subsidies on Farm Production in Case of Endogenous Input Quantities
Replaced with revised version of paper 07/29/09.panel data, subsidies, household model, endogeneity, Norwegian grain farming, Agricultural and Food Policy, Consumer/Household Economics, Production Economics,
DETERMINANTS OF PART-TIME FARMING AND ITS EFFECT ON FARM PRODUCTIVITY AND EFFICIENCY
Little attention has been given in the agricultural economics literature to the impact of off-farm work on farm productivity and efficiency. More knowledge about what determines part-time farming and whether farm productivity and efficiency are affected by part-time farming could help policy makers introduce better targeted rural development policies. This paper aims to fill the above-mentioned gaps by first analysing factors that influence the choice of off-farm work; and then examining how off-farm work influences productivity and technical efficiency at the farm level. An unbalanced panel data set from 1991 to 2005 from Norwegian grain farms is used for this purpose. The results show that the likelihood of off-farm work and the share of time allocated to it increase with increasing age (up to 39 years), and with low relative yields (compared to others farms in the surrounding area/region). The level of support payments is not significantly associated with the extent of off-farm work. Large-scale farms and single farmers tend to have a lower likelihood of off-farm work. Average technical efficiency was found to be 79%. Farmers with low variability in farm revenue were found to be more technically efficient than farmers with high revenue variability. We did not find any evidence of off-farm work share affecting farm productivity − the predicted off-farm work share was not statistically significant. In other words, we did not find any systematic difference in farm productivity and technical efficiency between part-time and full-time farmers.off-farm work, productivity, efficiency, unobserved heterogeneity, panel data, Farm Management,
Record sized Alepes vari and Nematalosa nasus
The herring scad, Alepes vari is a common pelagic
fish species in the family carangidae. The species
is the largest fish of the scad genus Alepes and
maximum length so far recorded all over the world
oceans is 560 mm TL (Froese & Pauly, FishBase 2016,
http://www.fishbase.org.). During a regular field
visit, an unusually large specimen of A. vari was
recorded from Kalamukku Landing Centre, Kerala
on 25th May, 2016. This was a male individual
measuring 600 mm in total length (TL) and weighing
1.6 kg (Fig. 1)and was caught by hook and line. Young
ones occasionally occur in pelagic trawls and larger
ones rarely occur in gill net and hook and line
catches
Indiscriminate exploitation of juvenile black pomfret by ring seines along Kerala coast
Black pomfret, Parastromateus niger is an highly
esteemed food fish with a very good demand in local
and export markets. Unusual heavy landings of
juvenile black pomfret was observed at the
Kalamukku Landing Centre on 22nd and 23rd August
2016. On 22nd August, a big shoal of about 2 tonnes
(t) of juvenile black pomfret was caught by one
mechanised inboard (280 HP engine) ring seine unit.
Similarly, on 23rd August about 1.25 t of juvenile
black pomfret was landed by two mechanised inboard
ring seine units with 440 HP engine power
Field identification of yellowfin and bigeye tuna
Tunas are commercially important food fishes
exploited from all the world oceans. Of the 9 species
contributing to the Indian tuna fisheries, yellowfin
and bigeye tuna grow to big sizes, and with superior
meat quality have high export demand.
Identification of these tuna species are
comparatively easier in fresh condition than the iced
or frozen condition due to discolouration, fin and
skin damage during handling and storage process.
In such cases certain internal characteristics such
as length of air bladder, liver shape and striation
are used. Misidentification of yellowfin and bigeye
tunas occurs in several cases. The present study is
based on field observations at Cochin Fisheries
Harbour and uses an easy field identification key
for yellowfin and bigeye tuna based on external
characteristics developed by Itano (2005) and IOTC
(2013). Bigeye tuna are landed stray numbers along
with yellowfin tunas, at Cochin Fisheries Harbour
Oil sardine from Tamil Nadu in fish markets of Kerala
Oil sardine, Sardinella longiceps is a highly
favoured fish in Kerala, due to the unique taste of
locally caught sardines, as perceived by many fish
consumers in the state. Normally, the oil sardine
forms the major catch of traditional fisherman in
Kerala almost around the year. Recently, after the
peak landings in 2012, catches have showed drastic
decline with the trend continuing in 2016 also (Fig.
1). It directly affected the livelihood of thousands
of local ringseine fishermen
Unusual heavy landings of flying gurnards at Munambam Fishing Harbour
Flying gurnards belongs to the familyDactylopteridae, distributed in tropical Indo-Pacificand Atlantic oceans. From the 7 speciesrepresenting two genera, Dactylopterus andDactyloptena only four species such asDactyloptena gilberti, D. macracantha,D. orientalis and D. peterseni are found in thewestern Indian Ocean. These are small to moderatesized marine bottom dwelling fish and mostlycaught by bottom trawls as by-catch in the nearshore waters and not having much commercialvalue
A unified description for nuclear equation of state and fragmentation in heavy ion collisions
We propose a model that provides a unified description of nuclear equation of
state and fragmentations. The equation of state is evaluated in Bragg-Williams
as well as in Bethe-Peierls approximations and compared with that in the mean
field theory with Skyrme interactions. The model shows a liquid-gas type phase
transition. The nuclear fragment distributions are studied for different
densities at finite temperatures. Power law behavior for fragments is observed
at critical point. The study of fragment distribution and the second moment
shows that the thermal critical point coincides with the percolation
point at the critical density. High temperature behavior of the model shows
characteristics of chemical equilibrium.Comment: 20 pages in RevTex, 11 figures (uuencoded ps files), to appear in
Phys. Rev.
Momentum--dependent nuclear mean fields and collective flow in heavy ion collisions
We use the Boltzmann-Uehling-Uhlenbeck model to simulate the dynamical
evolution of heavy ion collisions and to compare the effects of two
parametrizations of the momentum--dependent nuclear mean field that have
identical properties in cold nuclear matter. We compare with recent data on
nuclear flow, as characterized by transverse momentum distributions and flow
() variables for symmetric and asymmetric systems. We find that the precise
functional dependence of the nuclear mean field on the particle momentum is
important. With our approach, we also confirm that the difference between
symmetric and asymmetric systems can be used to pin down the density and
momentum dependence of the nuclear self consistent one--body potential,
independently. All the data can be reproduced very well with a
momentum--dependent interaction with compressibility K = 210 MeV.Comment: 15 pages in ReVTeX 3.0; 12 postscript figures uuencoded; McGill/94-1
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