Multilevel model of trade union membership

Presents a new theory of why people join or leave trade unions. Shows that a major influence on this decision is the quality of social relationships in the workplace. In particular, workplaces with a workforce of diverse occupational groups are not conducive to trade unionism.

Running a Cartel? Go directly to jail

Operators of cartels now face not only big fines, but also time in jail. And new laws criminalising cartels leave no room to move.

Improving the effectiveness of the Sex Discrimination Act: recommendations from the 2008 Senate Inquiry

One way to characterise the Rudd Government’s first year in office would be by the flurry of inquiries and reports that it commissioned. Three related to gender equality. The Productivity Commission conducted an inquiry into a national paid maternity, paternity and parental leave scheme and the House of Representatives Standing Committee on Employment and Workplace Relations conducted an inquiry into pay equity. This article is concerned with a third inquiry — the Senate Standing Committee on Legal and Constitutional Affairs (the committee) inquiry into the effectiveness of the Sex Discrimination Act 1984 (Cth) (SDA) in eliminating discrimination and promoting gender equality. These inquiries were not the Rudd Government’s only activities in relation to sex discrimination and gender equality. It also enacted legislation which removed discrimination against same sex couples from 68 Commonwealth laws and announced its intention to accede to the Optional Protocol to the International Convention on the Elimination of All Forms of Discrimination against Women.

An agent-based approach to value theory and wealth distribution in economics

Any attempt to model an economy requires foundational assumptions about the relations between prices, values and the distribution of wealth. These assumptions exert a profound influence over the results of any model. Unfortunately, there are few areas in economics as vexed as the theory of value. I argue in this paper that the fundamental problem with past theories of value is that it is simply not possible to model the determination of value, the formation of prices and the distribution of income in a real economy with analytic mathematical models. All such attempts leave out crucial processes or make unrealistic assumptions which significantly affect the results. There have been two primary approaches to the theory of value. The first, associated with classical economists such as Ricardo and Marx were substance theories of value, which view value as a substance inherent in an object and which is conserved in exchange. For Marxists, the value of a commodity derives solely from the value of the labour power used to produce it - and therefore any profit is due to the exploitation of the workers. The labour theory of value has been discredited because of its assumption that labour was the only ‘factor’ that contributed to the creation of value, and because of its fundamentally circular argument. Neoclassical theorists argued that price was identical with value and was determined purely by the interaction of supply and demand. Value then, was completely subjective. Returns to labour (wages) and capital (profits) were determined solely by their marginal contribution to production, so that each factor received its just reward by definition. Problems with the neoclassical approach include assumptions concerning representative agents, perfect competition, perfect and costless information and contract enforcement, complete markets for credit and risk, aggregate production functions and infinite, smooth substitution between factors, distribution according to marginal products, firms always on the production possibility frontier and firms’ pricing decisions, ignoring money and credit, and perfectly rational agents with infinite computational capacity. Two critical areas include firstly, the underappreciated Sonnenschein-Mantel- Debreu results which showed that the foundational assumptions of the Walrasian general-equilibrium model imply arbitrary excess demand functions and therefore arbitrary equilibrium price sets. Secondly, in real economies, there is no equilibrium, only continuous change. Equilibrium is never reached because of constant changes in preferences and tastes; technological and organisational innovations; discoveries of new resources and new markets; inaccurate and evolving expectations of businesses, consumers, governments and speculators; changing demand for credit; the entry and exit of firms; the birth, learning, and death of citizens; changes in laws and government policies; imperfect information; generalized increasing returns to scale; random acts of impulse; weather and climate events; changes in disease patterns, and so on. The problem is not the use of mathematical modelling, but the kind of mathematical modelling used. Agent-based models (ABMs), objectoriented programming and greatly increased computer power however, are opening up a new frontier. Here a dynamic bargaining ABM is outlined as a basis for an alternative theory of value. A large but finite number of heterogeneous commodities and agents with differing degrees of market power are set in a spatial network. Returns to buyers and sellers are decided at each step in the value chain, and in each factor market, through the process of bargaining. Market power and its potential abuse against the poor and vulnerable are fundamental to how the bargaining dynamics play out. Ethics therefore lie at the very heart of economic analysis, the determination of prices and the distribution of wealth. The neoclassicals are right then that price is the enumeration of value at a particular time and place, but wrong to downplay the critical roles of bargaining, power and ethics in determining those same prices.

The pricing of infrastructure initial public offerings : evidence from Australia

This paper explores first-day returns on infrastructure entity initial public offerings (IPOs) in Australia from 1996 to 2007. While a good deal has been written on the first-day returns of industrial and mining company IPOs and Real Estate Investment Trust IPOs, first-day returns of infrastructure entity IPOs have yet to be reported in the literature. The study uses ordinary least squares regression analysis to identify factors that might influence the percentage first-day returns theoretically available to investing subscribers and factors that might influence the aggregate amount of money left to subscribers by issuers. The study finds that first-day returns, on average, are not significantly different from zero. There is evidence, however, that suggests higher dividend yields and higher percentage direct costs of capital raising influence these first-day returns. The study also finds that infrastructure entity IPOs that seek to raise more equity capital leave less money on the table for subscribing investors.

Frequency and nature of reported incidents during emergency department care

Background The aim of this study was to examine reported incidents affecting Emergency Department (ED) episodes of care.
Methods A retrospective audit of ED patients was carried out in an urban district hospital in Melbourne, Australia from 1 January 2008 to 31 December 2008. The main outcome measure was presence or absence of reported patient-related incident(s) during ED care.
Results There were 984 patient-related incidents (n¼984) during 2008.The most common incidents were related to patient behaviour (66.4%), patient management (10.1%) and medications (6.5%). Patients whose ED care involved reported incident(s) were older, had higher triage categories, longer length of ED stay and were more likely to need hospital admission or leave at their own risk. Eighteen per cent of reported incidents occurred in patients aged 65 years and over. Incidents affecting older patients were more likely to be related to breach of skin integrity, patient management, diagnosis and patient identification, and less likely to involve patient behaviour.
Conclusions Reported incident(s) occurred in 0.47% of ED episodes of care. Differences in personal and clinical characteristics of patients whose ED care involved reported incident(s) highlights the need for better understanding of incidents occurring in the ED in order to improve systems for high-risk patients.

Exploring multidimensional person-environment fit

The current study examines the validity of a multidimensional Person-Environment (PE) fit model proposed by Jansen and Kristof-Brown (2006). The overall aim of the paper is to test the model’s factor structure and influences upon outcome measures. A panel of organisational employees from a wide range of companies and locations were asked to complete a survey (n = 1875) measuring five discrete multidimensional facets of PE fit (Person-Organisation, Person-People, Person-Job, Person-Group and Person-Vocation) and three outcomes; organisational commitment, intention to leave and job satisfaction. The first sequence of analysis tested the proposed model using Confirmatory Factor Analysis (CFA) statistical approaches. Model comparisons showed that Jansen and Kristof-Brown’s original model in which the five facets of fit coalesce into a multidimensional variable was a poor fit with the data, but that a model in which the five facets of fit operate independently was a good fitting one. The second sequence of analysis found that the model without the multidimensional variable strongly predicted the outcomes of commitment, job satisfaction and intention to leave. This paper discusses the implication of this research in relation to the PE fit literature.

What decision rules might pink-footed geese use to depart on migration? An individual-based model

Decisions taken during migration can have a large effect on the fitness of birds. Migration must be accurately timed with food availability to allow efficient fueling but is also constrained by the optimal arrival date at the breeding site. The decision of when to leave a site can be driven by energetics (sufficient body stores to fuel flight), time-related cues (internal clock under photoperiodic control), or external cues (temperature, food resources). An individual based model (IBM) that allows a mechanistic description of a range of departure decision rules was applied to the spring migration of pink-footed geese (Anser brachyrhynchus) from wintering grounds in Denmark to breeding grounds on Svalbard via 2 Norwegian staging sites. By comparing predicted with observed departure dates, we tested 7 decision rules. The most accurate predictions were obtained from a decision rule based on a combination of cues including the amount of body stores, date, and plant phenology. Decision rules changed over the course of migration with the external cue decreasing in importance and the time-related cue increasing in importance for sites closer to breeding grounds. These results are in accordance with descriptions of goose migration, following the “green-wave”: Geese track the onset of plant growth as it moves northward in spring, with an uncoupling toward the end of the migration if time is running out. We demonstrate the potential of IBMs to study the possible mechanisms underlying stopover ecology in migratory birds and to serve as tools to predict consequences of environmental change.

Testing a multidimensional theory of person-environment fit

The current study examines the validity of a multidimensional Person-Environment (PE) fit model proposed by Jansen and Kristof-Brown (2006). The overall aim of the paper is to test the model's factor structure and influences upon outcome measures. A panel of organizational employees from a wide range of companies and locations were asked to complete a survey (n = 1,875) measuring five discrete dimensions of perceptual PE fit (Person-Organization, Person-People, Person-Job, Person-Group, and Person-Vocation) and three outcomes (organizational commitment, intention to leave, and job satisfaction). The first sequence of analysis tested the proposed model using Confirmatory Factor Analysis (CFA) statistical approaches. Model comparisons showed that Jansen and Kristof-Brown's (2006) original model in which the five dimensions of fit coalesce into a multidimensional construct was a poor fit with the data, but that a model in which the five dimensions of fit operate independently fit the data well. The second sequence of analysis found that the model without the multidimensional construct strongly predicted the outcomes of commitment, job satisfaction, and intention to leave. This paper discusses the implication of this research in relation to the PE fit literature.

Succession and Indigenous Australians : addressing Indigenous customary law notions of 'property' and 'kinship' in a succession law context

The purpose of this article is to critically evaluate the existing capacity of Indigenous people to exercise succession rights against their estate. This article begins with a discussion of the sources of the general succession laws in Australia, noting that they have derived from UK law, where the common law notions of property, property rights and family, including the expectational right to succeed to property, are all important factors. These common law notions do not easily fit within the spectrum of Indigenous customary law. Generally, many Indigenous Australians will die without executing a valid will (ie, they die intestate) and it is here that this article undertakes an examination of the general intestacy laws in all Australian jurisdictions noting the inadequacy of the provisions to recognise Indigenous persons’ spiritual and cultural obligations to property, land or otherwise, together with a failure to distinguish extended Indigenous kinship relationships under Indigenous customary law. It is argued that Indigenous people who die intestate should be supported by a flexible and adaptive intestacy framework, responsive to the full customary and cultural responsibilities of the deceased, thus promoting an organic and developmental approach to succession entitlements.

On 4 June 2008 Siberian Red Knots at Elbe Mouth kissed the canonical evening migration departure rule goodbye

Observations of departing Siberian-breeding Red Knots Calidris canutus canutus from their central staging site during northward migration, the Schleswig-Holstein Wadden Sea, Germany, in early June 2008, challenge the established notion that departing long-distance migrating waders only leave around sunset. During four days we scanned several thousand Red Knots for colour-ringed individuals and found a total of 20 different individuals that were previously ringed at either their main wintering site, the Banc d'Arguin in Mauritania, or at stopover sites on the Atlantic coast of France. Body masses of captured Red Knots in Schleswig-Holstein were higher than 200 g and hematocrite values showed an average of 58%, clearly indicating that they were ready for take-off. On all except one evening, we noted impressive departure movements during the incoming tide. On that exceptional evening a cold front thunderstorm passed over the area. Late the next morning, thousands of Red Knots departed during the incoming tide. We assume that the birds avoided taking off in adverse weather conditions and elaborate why Red Knots presumably traded off advantages from departing during twilight. We suggest that during spring migration, schedules are so tight that further delays decrease fitness, either because it would cause another full day of exposure to high predation risk by falcons, or because of conditions upon arrival on the tundra.

Trevor Gale raises equity fears as Bradley recommendations could concentrate disadvantage

Disadvantaged students could be further concentrated in younger and regional universities if Bradley review recommendations on entitlements are implemented without stringent controls, derailing a major objective of the review, according to National Centre for Student Equity in Higher Education director Trevor Gale.

Prescribed fluid consumption and its effects on the physiology and work behaviour of Australian wildland firefighters

The present study examined firefighters' ability to consume a prescribed fluid volume (1200 ml · h-1) during a wildland fire suppression shift and compare the effect of this additional fluid prescription with self-paced drinking on firefighters' hydration status and plasma sodium concentration post shift and their heart rate, core temperature and physical activity during their shift. Thirty-four firefighters were evenly divided into two drinking groups: self paced and prescribed. Prescribed drinkers did not meet the required 1200 ml·h-1 intake, yet they consumed twice the fluid drank by the self-paced group. No differences were noted between groups in plasma sodium levels or hydration status before or after their shift. Prescribed fluid consumption resulted in significantly lower core temperature between two and six hours into the shift. This did not coincide with lower cardiovascular strain, greater physical activity when compared to the self-paced drinking group. Additional fluid consumption (above self-paced intake) did not improve firefighter activity or physiological function (though it may buffer rising core temperature). It seems that wildland firefighters, at least in mild to warm weather conditions, can self-regulate their fluid consumption and work behaviour to leave the fireground hydrated at the conclusion of their shift.

Temporal semantic compression for video browsing

We present a video browsing approach, termed Temporal Semantic Compression (TSC), that uses automated measures of interest to support today's foraging behaviours. Conventional browsers 'compress' a video stream using simple 2x or 8x fast-forward. TSC browsers dynamically filter video based on a single user gesture to leave out more or less of the boring bits. We demonstrate a browser with an example interest measure, derived from an automated estimate of movie tempo, to forage in terms of narrative structures such as crises, climaxes, and action sequence book-ends. Media understanding algorithms facilitate browsing, and interactivity enables the human-in-the-loop to cope when those algorithms fail to cross the semantic gap.

Fast cross-validation of kernel fisher discriminant classifiers

Given n training examples, the training of a Kernel Fisher Discriminant (KFD) classifier corresponds to solving a linear system of dimension n. In cross-validating KFD, the training examples are split into 2 distinct subsets for a number of times (L) wherein a subset of m examples is used for validation and the other subset of(n - m) examples is used for training the classifier. In this case L linear systems of dimension (n - m) need to be solved. We propose a novel method for cross-validation of KFD in which instead of solving L linear systems of dimension (n - m), we compute the inverse of an n × n matrix and solve L linear systems of dimension 2m, thereby reducing the complexity when L is large and/or m is small. For typical 10-fold and leave-one-out cross-validations, the proposed algorithm is approximately 4 and (^4/9n) times respectively as efficient as the naive implementations. Simulations are provided to demonstrate the efficiency of the proposed algorithms.