Despite the frequent use of fiscal policy for stabilization purposes and the important role fiscal activism has played over the last decade, the size of budgetary multipliers (i.e. the output response following an exogenous shock to fiscal policy) has been heatedly debated at the theoretical and...

A critical requirement for efficient fiscal policy is a reliable understanding of its impact on the aggregate economy for different policy instruments and under different economic conditions. Indeed, there is strong evidence to suggest that fiscal multipliers vary with economic conditions, the...

The fundamental problem of external validity is not to generalize from one experiment, so much as to experimentally test generalizable theories. That is, theories that explain the systematic variation of causal effects across contexts. Here we show how the graphical language of causal diagrams...

This study investigates the impacts of public expenditure innovations on exchange rate volatility in South Africa using quarterly data for the period 1970-2019. To achieve this objective, a version of the vector autoregressive impulse response model proposed by Jordà is employed and the...

This paper employs a cointegrated vector autoregressive model to assess the growth effect of aid in Uganda over the period 1972-2008. Results show that aid in Uganda has had both direct and indirect beneficial association with growth; that it is the productivity and not the stead state level of...

We examine the effect of pandemics on selected commodity prices-in particular, those of zinc, copper, lead, and oil. We set up a vector autoregressive model and analyse data since the mid-nineteenth century to determine how prices reacted to pandemics such as the 1918 Spanish Flu, 1957 Asian...

Debt-financed fiscal stimulus programmes directly stimulate aggregate demand through government expenditure or tax cuts, but their effectiveness is highly dependent on direct crowding out of private sector expenditure, spillover effects to the private sector through a higher risk premium on...

This paper estimates the output cost of fighting inflation-the sacrifice ratio-for the South African economy using quarterly data spanning the period 1998Q1-2019Q3. To compute the sacrifice ratio, the structural vector autoregressive model developed by Cecchetti and Rich (2001) based on...

The aim of this paper is to assess South Africa's fiscal multiplier across different states of the economy, with a focus on the financial accelerator mechanism of fiscal policy shocks, by estimating impulse response functions from both linear and non-linear local projections. The model finds...

This paper examines the role of financial frictions in the public debt-growth nexus, documenting that a public debt shock has different macro-financial implications dependent on the state of financial markets in South Africa. A non-linear vector autoregression model is estimated which allows the...