## Archive of posts in category “economics”

### Free trade (single good case)

I set up a simple model to determine the production and consumption in free trade between nations.

- Categories: economics
- Tags: global economy, from zhihu

### The core of a voting system is the intersection of Pareto sets

There is a very neat relation between the core (the set of proposals that defeats every proposal) of a voting system and the Pareto sets of the voters. Suppose there is a voting system of quota $q$, then the core is the intersection of all such sets: the Pareto set of $q$ of the voters.

- Categories: economics
- Tags: voting system, preference relation, pareto efficiency

### Relationship between the Gini coefficient and the variance

Both the Gini coefficient and the variance are measures of statistical dispersion. We are then motivated to find the relationship between them. It turns out that there is a neat mathematical relationship between them.

- Categories: economics
- Tags: from zhihu, calculus, probability