1. Overview

Usual design considerations:

• longitudinal / cross-sectional（截面的or历时的）
• survey / archival / observational（基于调查or文档or观察的）
• qualitative / quantitative（定性的or定量的）

Network-specific design considerations:

• Sociocentric design (i.e whole-network design)
• Egocentric design (i.e. ego-network design)
• Cognitive social structure

2. Sociocentric design

研究对象为特定的一些节点所构成的网络（a specific group）：

1. Start with a set of actors.
2. Collect data on the presence/absence/strength of ties of various kinds among all pairs of members of the set.
3. Result is a network (or multiple networks, where each network represents a different kind of tie).

调查收集ties的一些常见方式：

• Survey(调查): Ask each person about ties to each other person.
• Ethnographic(民族志): Observe interactions, interview people who know them.
• Archival(档案): Search records, memos, online traces.

另一种看待network的方式——network = dyadic variable