The Nature of Technological Knowledge: Philosophical Reflections and Educational Consequences

Technological knowledge has a normative component that scientific knowledge does not have. When we have knowledge of a computer, that often comprises normative judgements: it functions well or it does not function well. In knowledge of technical norms, rules and standards as another type of technological knowledge we also find a normative component. This characteristic has consequences for our assessment of knowledge. For scientific knowledge truth is the ultimate condition. For knowledge of norms, rules and standards as a type of technological knowledge this the condition is problematic. They refer to things that do not exist yet, but are still to be designed or made. Nor truth, but effectiveness is the condition here. For technology education the normative component is important. Pupils must learn to make judgements about effectiveness, as this is a prominent characteristic of technological knowledge, that makes it distinct from scientific knowledge. Pupils must also learn to deal with ethical and other values when doing technological project work.     

Which sanctions matter? analysis of the EU/russian sanctions of 2014

We use a quasi-natural experiment of reciprocal imposition of trade sanctions by Russia and the EU since 2014. Using UNCTAD/BACI bilateral flows data we take this unique opportunity to analyse both sanctions. In particular, we study the effectiveness of narrow versus broadly defined sanctions, and differences in the effectiveness of sanctions imposed on exports and imports. We show that the Russian sanctions imposed on European and American food imports resulted in about an 8 times stronger decline in trade flows than those imposed by the EU and the US on exports of extraction equipment. These results do not appear to be driven by diversion of trade flows via non-sanctioning countries. Hence the difference in sanctions’ effectiveness can be attributed to the limited retroactivity of Western sanctions, which allowed exemptions for exports made pursuant to contracts made prior to 2014.     

Portfolio optimisation under non-linear drawdown constraints in a semimartingale financial model

A drawdown constraint forces the current wealth to remain above a given function of its maximum to date. We consider the portfolio optimisation problem of maximising the long-term growth rate of the expected utility of wealth subject to a drawdown constraint, as in the original setup of Grossman and Zhou (Math. Finance 3:241–276, 1993). We work in an abstract semimartingale financial market model with a general class of utility functions and drawdown constraints. We solve the problem by showing that it is in fact equivalent to an unconstrained problem with a suitably modified utility function. Both the value function and the optimal investment policy for the drawdown problem are given explicitly in terms of their counterparts in the unconstrained problem.     

Luddites, the industrial revolution, and the demographic transition

Technological change was unskilled-labor-biased during the early industrial revolution, but is skill-biased today. This implies a rich set of non-monotonic macroeconomic dynamics which are not embedded in extant unified growth models. We present historical evidence and develop a model which can endogenously account for these facts, where factor bias reflects profit-maximizing decisions by innovators. In a setup with directed technological change, and fixed as well as variable costs of education, initial endowments dictate that the early industrial revolution be unskilled-labor-biased. Increasing basic knowledge then causes a growth takeoff, an income-led demand for fewer but more educated children, and a transition to skill-biased technological change in the long run.     

Identity Talk of Aspirational Ethical Leaders

This study investigates how business leaders dynamically narrate their aspirational ethical leadership identities. In doing so, it furthers understanding of ethical leadership as a process situated in time and place. The analysis focuses on the discursive strategies used to narrate identity and ethics by ethnic Chinese business leaders in Indonesia after their conversion to Pentecostal–charismatic Christianity. By exploring the use of metaphor, our study shows how these business leaders discursively deconstruct their ‘old’ identities and construct their ‘new’ aspirational identities as ethical leaders. This leads to the following contributions. First, we show that ethical leadership is constructed in identity talk as the business leaders actively narrate aspirational identities. Second, the identity narratives of the business leaders suggest that ethical leadership is a context-bound and situated claim vis-à-vis unethical practice. Third, we propose a conceptual template, identifying processes of realisation and inspiration followed by significant shifts in understanding, for the study of aspirational ethical leadership.     

An Empirical Examination of U.K. International Unit Trust Performance

We examine the performance of U.K. unit trusts with international equity objectives between January 1985 and December 2000 using four international factor models. The international version of the Carhart (1997) model performs the best in explaining the cross-section of international stock returns. There is little evidence of superior performance by international trusts relative to the global models. We also find that the choice between a local and global version of the Carhart model has a significant impact on the relation between the investment sector of the trust and performance.JEL classification: G10, G12