This article intends to evidence the flexibility effect in the investment decision. This flexibility is known by the real options term, these options possess value, which will increase the value of an investment that possesses them. The traditional investments evaluation methods are not enough...

An article about Kihlstrom and Mirman about comparative risk aversion with many goods is critiqued. If "more risk averse" is interpreted as signifying that an individual is less willing to accept a median-preserving spread, then risk aversion cannot be compared across individuals with different...

Thomas Piketty's "Capital in the 21st century" has been the most important book economy in recent times. Its aim integrates the debate theories of growth, income distribution, inequality and differences between the extremes income and income of the majority. The work predicts a slow increase in...

Neste texto apresento o modelo base da abordagem teórica denominada por New Macroeconomics aplicando-o à tendência secular, aos ciclos económicos e ao crescente endividamento de Portugal. É demonstrado que i) o endividamento crescente prejudica as exportações e favorece as importações e...

Using data from the 2017-2018 Households Budget Survey, the work investigates the demographic and socioeconomic determinants of the Brazilian families investment in the basic education of their school-age members, which is processed through three sequential decisions: school attendance, the...

Portuguese Abstract: A literatura econômica documenta que eventos extremos podem induzir alterações na propensão ao risco. Este estudo investiga se a crise 2008/2009 afetou o comportamento de investimento em diversos ativos, financeiros e reais, por parte de dezenas de milhares de cidadãos...

Using data from the 2017-2018 Households Budget Survey, the work investigates the demographic and socioeconomic determinants of the Brazilian families investment in the basic education of their school-age members, which is processed through three sequential decisions: school attendance, the...

This research evidences the value of flexibility on the investment decision, in the exploration sector of copper, face to the existence of an abandonment option. The results of three evaluation models are compared: the Net Present Value; the Binomial and a Suitable Binomial to the exploration...