Multilevel, random-effects models correctly address hierarchical structures, though having few units at higher levels can cause problems in convergence, especially where complex modelling is required.

The bureaucracy may grow into a complex structure with multiple layers ... One of the key characteristics of a bureaucracy is the use of hierarchical and centralized procedures to simplify or ...

Unitree Robotics AlienGo - A more advanced robotic dog capable of carrying heavier loads and performing complex tasks, popular for research ... and API for custom programming. Boston Dynamics Spot - ...