What are the characteristics of ideal displacement and ideal mixed flow model?

The characteristics of ideal displacement and ideal mixed flow models are as follows:

First, the ideal replacement model.

1, the labor market tends to be balanced: the ideal substitution model holds that with the matching of labor supply and demand, the labor market will spontaneously tend to be balanced, that is, every worker can find a suitable job and recruit suitable workers for every position.

2. Incompleteness of the matching process: The ideal replacement model assumes that the matching process is incomplete, that is, the matching between workers and positions takes a certain amount of time and cost, and there are certain search and friction costs. The ideal replacement model uses a matching function to describe the matching probability between workers and jobs, which is usually influenced by many factors.

Second, the ideal mixed flow model

1, Heterogeneity: The ideal mixed flow model takes into account the heterogeneity of labor force, that is, different workers have different skills, education and experience, and different jobs have different requirements and conditions.

The ideal mixed flow model analyzes the sequencing and flow process between workers and posts in the labor market. The matching between workers and jobs is not simply to find a suitable match, but to consider the matching quality and adaptability of both parties.

2. Income gap: The ideal mixed flow model analyzes the causes of the income gap in the labor market, and the related factors include skill matching, work quality, labor mobility and unequal opportunities.

The ideal mixed flow model holds that the labor market is an incomplete market, and there is information asymmetry and transaction cost between labor supply and job demand, which leads to incomplete resource allocation.

The origin of ideal mixed-flow model;

The ideal mixed-flow model is a model used to describe fluid flow. Its origin can be traced back to1fluid mechanics research at the end of the 9th century and the beginning of the 20th century. At the end of 19, French mathematician Naville and German mathematician Stokes respectively put forward the basic equation describing fluid flow-Naville-Stokes equation.

This set of equations includes mass conservation equation, momentum conservation equation and energy conservation equation, which can describe the movement and deformation in fluid. Naville-Stokes equation is a group of nonlinear partial differential equations, which is difficult to solve.

Although there are some analytical solutions under special circumstances, they are generally solved by numerical methods. In addition, the equation contains a lot of complicated details, which makes it difficult to model the fluid flow in detail.

In order to simplify the model and solving process, researchers began to consider some simplified assumptions. One of them is the ideal mixed-flow model. In the ideal mixed-flow model, it is assumed that the fluid is uniformly mixed without viscosity and heat conduction, and the velocity and temperature of all points are the same.