ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Consumer allocation models: Choice of functional form (1993)

Barten, Anton P.

Springer

Empirical economics 18 (1993), S. 129-158

add to mindlist on the mindlist

Details

ISSN: 1435-8921

Keywords: C12 ; C13 ; D12 ; Non-nested hypothesis testing ; Demand systems ; Choice of functional form

Source: Springer Online Journal Archives 1860-2000

Topics: Economics

Notes: Abstract The functional form of consumer allocation models should be able to satisfy theoretical properties derived from the theory of consumer demand. The paper sketches four approaches that meet this condition. Of course, also empirical performance matters. Next to naive goodness-of-fit comparison, non-nested hypothesis testing can be employed. The latter technique is applied to a comparison of four versions of differential demand systems: the Rotterdam system, a version of the Almost Ideal Demand (AID) system, the CBS system and the NBR system. These systems are artificially nested in a more general model using scalar weights in contrast to Barten and McAleer (1991) who use matrix weights for this purpose. Annual data over the period 1921–1981 for The Netherlands for four major groups of consumer expenditure have been used for the empirical application. The CBS system dominates the others.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01238883

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

A novel technique for the measurement of disruption in high-pressure homogenization: Studies on E. coli containing recombinant inclusion bodies (1991)

Middelberg, Anton P. J. ; O'Neill, Brian K. ; L. Bogle, I. David ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 38 (1991), S. 363-370

add to mindlist on the mindlist

Details

ISSN: 0006-3592

Keywords: homogenization, high-pressure ; cell disruption ; inclusion bodies ; size distribution ; centrifuge, analytical ; Escherichia coli ; Chemistry ; Biochemistry and Biotechnology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology

Notes: The high-pressure homogenization of Escherichia coli, strain JM101, containing inclusion bodies of recombinant porcine somatotropin was investigated. A novel technique employing an analytical disc centrifuge was used to monitor the disruption. This a direct technique which measures cell disintegration rather than soluble protein release. The technique is particularly suited to measurements where the disruption approaches 100%. The disk centrifuge provides a size distribution of the homogenate, and furnishes evidence for the preferential disruption of larger cells. For E. coli containing inclusion bodies, and increase in the cell feed concentration from 145 g/L (wet weight) to 330 g/L resulted is poorer homogenization. Poorer disruption was also obtained by lowering the feed temperature from 20°C to 5°C. Only slight variations in performance were obtained by increasing the feed pH from 7.5 to 9.0 or by storing the feed at 4°C for 24 h prior to disruption. Comparison with uninduced E. coli strain JM101, showed that the disruption obtained is higher for bacteria containing a recombinant inclusion body.

Additional Material: 8 Ill.