This paper assesses cartel practices in the national cement industry based on Indonesia's anti-monopoly law. Particularly, consider the fact that the market leaders, PT Sement Gresik Group and PT Indocement respectively owns 43% and 34% of the national cement market.

We evaluate the impact of technological externalities on the location choices of duopolistic firms in a Weber triangle. Assuming technological spillover effects to be decreasing in the distance between firms, we show that each firm’s optimum location is independent of a demand shock when the...

We analyse an infinite-period model of duopolistic competition in a market with consumer switching costs, in which in every period new consumers arrive and a fraction of old consumers leaves. We show that prices (and profits) are higher than in a market without switching costs, and that this...