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  • 1
    Electronic Resource
    Electronic Resource
    Good News and Bad News: Search from Unknown Wage Offer Distributions (2000)
    Springer
    Experimental economics 2 (2000), S. 197-225 
    Details
    ISSN: 1573-6938
    Keywords: job search ; unknown distributions ; reservation wage property ; controlled experiments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract The largest market in national economies is the labor market. Labor market contracting is characterized by job search, often from unknown wage offer distributions. This paper reports experimental tests of finite horizon models of job search in which the wage offer distribution is unknown. Theoretically-optimal search from an unknown wage offer distribution can have the seemingly paradoxical property that some offers will be accepted that are lower than other offers that will be rejected in the same period of the search horizon. Thus the reservation wage property (or lowest acceptable wage path) may not exist. This can occur because an offer that is a priori relatively high (“good news”) can imply that it is highly probable that search is from a favorable distribution, and such an offer can look unattractive when it is an a posteriori relatively low offer from a favorable distribution (“bad news”). This paper reports results from experimental treatments for search from unknown distributions in which the reservation wage property does exist and treatments in which it does not exist. We find that the consistency of search behavior with search theory reported in earlier papers is robust to the presence or absence of the reservation wage property and to whether the draws come from known or unknown distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009910627375
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Good news and bad news: Search from unknown wage offer distributions (2000)
    Springer
    Experimental economics 2 (2000), S. 197-225 
    Details
    ISSN: 1573-6938
    Keywords: job search ; unknown distributions ; reservation wage property ; controlled experiments ; C91 ; D83 ; J64
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract The largest market in national economies is the labor market. Labor market contracting is characterized by job search, often from unknown wage offer distributions. This paper reports experimental tests of finite horizon models of job search in which the wage offer distribution is unknown. Theoretically-optimal search from an unknown wage offer distribution can have the seemingly paradoxical property that some offers will be accepted that are lower than other offers that will be rejected in the same period of the search horizon. Thus the reservation wage property (or lowest acceptable wage path) may not exist. This can occur because an offer that is a priori relatively high (“good news”) can imply that it is highly probable that search is from a favorable distribution, and such an offer can look unattractive when it is an a posteriori relatively low offer from a favorable distribution (“bad news”). This paper reports results from experimental treatments for search from unknown distributions in which the reservation wage property does exist and treatments in which it does not exist. We find that the consistency of search behavior with search theory reported in earlier papers is robust to the presence or absence of the reservation wage property and to whether the draws come from known or unknown distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669196
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Electroanalysis with electrodes modified by inorganic films (1991)
    Weinheim : Wiley-Blackwell
    Electroanalysis 3 (1991), S. 869-877 
    Details
    ISSN: 1040-0397
    Keywords: Modified electrodes ; electroanalysis ; electrocatalysis ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electroanalytical utility of electrodes modified with inorganic films is reviewed. Various types of inorganic layers (metal oxides, polynuclear transition metal cyanides, zeolites, metal porphyrins and phthalocyanines) are assessed. Various detection schemes based on these modified surfaces are described in 129 references.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140030902
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Polishable composite electrode based upon graphite powder modified with an electrochemically deposited catalyst (1994)
    Weinheim : Wiley-Blackwell
    Electroanalysis 6 (1994), S. 976-981 
    Details
    ISSN: 1040-0397
    Keywords: Modified electrodes ; Electrocatalysis ; Ruthenium ; Nitrosamines ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A polishable bulk-modified electrode is described that contains polymeric-mixed valent ruthenium oxide with cyano cross-links (mvRuCN) as a catalyst. Because mvRuCN is not available as an isolated compound, it was electropolymerized on graphite powder that was subsequently formed into a conducting composite with epoxy. Except for promoting oxidations at a more positive potential, this composite behaved the same as mvRuCN films on glassy carbon. Electrocatalytic oxidation of various N-nitrosamines, As(III), glutathione, isotocin, and myoglobin was observed. Flow-injection analysis of 50 μM N-nitrosodi-n-propylamine with amperometric detection at the bulk-modified composite electrode yielded currents of 2.5 ± 0.1 μA (5 trials) when the carrier solution is pH 1.5 phosphate buffer. The use of a micellar carrier,pH 1.5 phosphate buffer in 0.01 M hexadecyltrimethylammonium chloride, decreased the sensitivity of the flow-injection amperometric determination of N-nitrosodi-n-phenylamine by 50%, but otherwise, the behavior of the electrode was unchanged. The major advantages of the bulk-modified electrode over the surface-modified electrode jras the long-term stability (at least several months with dry storage) and polishability. Regarding trie latter, 19 replicates of the oxidation of As(III) yielded a relative standard deviation (RSD) of the current response of 3% when the surface was polished between each trial.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140061110
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  • 5
    Electronic Resource
    Electronic Resource
    Solid-state amperometric sensors for gas phase analytes: A review of recent advances (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 97-101 
    Details
    ISSN: 1040-0397
    Keywords: Amperometric sensor ; Gas analysis ; Solid electrolytes ; Modified electrodes ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A review is geven on solid-state amperometric sensors designed for the detection of gaseous analytes. Attention is geven primarily to sensors used in the absence of a bulk liquid phase that have been reported in the literature since 1992, although a historical perspective is presented. The review is limited to sensors employing solid polymer electrolytes, transition metal powders, and inorganic materials prepared by sol-gel processes as the solid-state electrylyte. The wide applicability of solid atate sensors to gas phase species is demonstrated through numerous examples. Analytes determined include O2, H2, CO, NO2, NH3, and SO2.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090202
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Electrochemical oxidation and determination of heparin at electrodes modified with ruthenium oxide or copper oxide (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 675-679 
    Details
    ISSN: 1040-0397
    Keywords: Heparin ; Modified electrodes ; Electrocatalysis ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electrochemical oxidation of full-size heparin (13-15 kDa) is demonstrated in 1 M H3PO4 at a glassy carbon electrode coated with a ruthenium oxide film. The pathway apparently is analogous to chemical oxidation by periodate. By comparison to currents from inorganic species, it is apparent that only about 2 electrons per mole are involved. Flow injection analysis (FIA) allowed determinations down to 2 μM heparin, but the calibration plot was nonlinear. Low molecular weight heparin (5-6 kDa) was not electroactive with this system. In basic solution at a glassy carbon electrode that is modified with a film of Cu2O, both full-size and low molecular weight heparin are oxidized. The pathways involved oxidative desulfation and attack on saccharide units with evolution of CO2. Linear calibration plots which extended into the sub-μM level were obtained by FIA. The detection limits, which were based on a value of 3 for the ratio of the signal to the standard deviation of replicates, were 9 nM for full-size and 20-30 nM for various low molecular weight heparin samples.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090903
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Amperometric detection after HPLC separation of selected polypeptides and proteins at an electrode modified by mixed valent ruthenium oxide crosslinked with cyanide (1993)
    Weinheim : Wiley-Blackwell
    Electroanalysis 5 (1993), S. 657-661 
    Details
    ISSN: 1040-0397
    Keywords: Modified electrodes ; Reverse-phase ; HPLC ; Proteins ; Peptides ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An indicator electrode, in which a film containing Ru oxides with cyano-crosslinks comprised the active surface, was used in an amperometric detector for ion-exchange and reverse-phase high-performance liquid chromatography (HPLC). The latter used a C-18 column and an eluent of 0.04 M citric acid, 0.1 M KH2PO4, 0.1% trifluoroacetic acid, and 20-80% acetonitrile. Oxytocin, isotocin, vasopressin, tocinoic acid, myoglobin, and ribonuclease A were separated and determined with detection limits at the 1-3 pmol level. The response to ribonuclease A, as a typical example, was linear over the range of 0.050-2.5 μM, with a slope of 15 nA/μM at 0.94 V (vs. Ag/AgCl). A single preparation of the electrode was generally stable for 3 weeks, as long as the analyte concentrations were below 10 μM.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140050806
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    Paper (German National Licenses)
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