STERGM Core-Mechanism Evaluation Report (With Transition Models and Descriptive Statistics)
Generated at: 2026-03-16 20:25:10.440847
Speed mode: strict_filtered_core_mechanism_with_transition_models_and_descriptive_stats
Mode note: strict data filter + patent-size cap(<=5) + top-node cap + matrix-based NA-dyad networks + NetSeries(NA.impute='0') + symmetrical formation/persistence specification + main structural path(edges, gwesp) + alternative structural path(edges, gwdsp) + lagged node capability(evcent, tech_size) + static dyadic covariates(proximity, history) + period descriptive statistics + transition-specific full-model coefficients + true single-core execution (no cluster) + GOF only for the mechanisms actually retained in the final model

1. Data / Time Range
Input file: C:/Users/ACER/Desktop/无人机专利数据/tech1_network_output/patent_tech_long_raw.csv
Years: 2016 - 2025
Periods: 2016-2017, 2018-2019, 2020-2021, 2022-2023, 2024-2025
Roster size: 95

2. Data filtering
min_total_count = 40
min_periods = 4
edge_threshold = 3
max_nodes_keep = 120
max_tech_per_patent = 5

3. Variable design
Main structural path: edges + gwesp
Alternative structural path for comparison: edges + gwdsp
Node capability: evcent_lag_sqrt + tech_size_lag_sqrt (+ absdiff counterparts)
Dyadic mechanism: proximity_mat_static + history_mat_static
Added in this version: period descriptive statistics + transition-specific full-model coefficients
Removed from this version: prediction / holdout simulation / module homophily / module complementarity

4. Structural zero implementation
All periods use the same roster.
Inactive-node dyads are encoded as NA in each period network.
Conditional modeling LHS is NetSeries(net_list, NA.impute='0').

5. Additional outputs aligned with period-based dynamic analysis
Period-level descriptive statistics have been generated.
Transition-specific full-model coefficients have been generated.
Note: with 5 periods, STERGM yields 4 transition-specific coefficient sets.

6. GOF retained in this version
Primary GOF: ~ degree + espartners + distance
Fallback GOF: ~ degree + distance
No prediction-related GOF. No module-related GOF.

7. Model comparison
                            model
1      fit_precheck_edges_persist
2 fit_structural_main_edges_gwesp
3  fit_structural_alt_edges_gwdsp
4   fit_capability_lagged_nodecov
5         fit_full_core_mechanism
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   formula_used
1                                                                                                                                                                                                                                                                                                                                                                                                                                                                     series ~ Form(~ edges) + Persist(~ edges)
2                                                                                                                                                                                                                                                                                                                                                                                                          series ~ Form(~edges + gwesp(0.25, fixed = TRUE)) + Persist(~edges +      gwesp(0.25, fixed = TRUE))
3                                                                                                                                                                                                                                                                                                                                                                                                          series ~ Form(~edges + gwdsp(0.25, fixed = TRUE)) + Persist(~edges +      gwdsp(0.25, fixed = TRUE))
4                                                                                                                                       series ~ Form(~edges + gwesp(0.25, fixed = TRUE) + nodecov("evcent_lag_sqrt") +      absdiff("evcent_lag_sqrt") + nodecov("tech_size_lag_sqrt") +      absdiff("tech_size_lag_sqrt")) + Persist(~edges + gwesp(0.25,      fixed = TRUE) + nodecov("evcent_lag_sqrt") + absdiff("evcent_lag_sqrt") +      nodecov("tech_size_lag_sqrt") + absdiff("tech_size_lag_sqrt"))
5 series ~ Form(~edges + gwesp(0.25, fixed = TRUE) + nodecov("evcent_lag_sqrt") +      absdiff("evcent_lag_sqrt") + nodecov("tech_size_lag_sqrt") +      absdiff("tech_size_lag_sqrt") + edgecov(proximity_mat_static) +      edgecov(history_mat_static)) + Persist(~edges + gwesp(0.25,      fixed = TRUE) + nodecov("evcent_lag_sqrt") + absdiff("evcent_lag_sqrt") +      nodecov("tech_size_lag_sqrt") + absdiff("tech_size_lag_sqrt") +      edgecov(proximity_mat_static) + edgecov(history_mat_static))
       AIC      BIC
1 7866.228 7881.694
2 7052.340 7083.271
3 7639.613 7670.545
4 5910.376 6003.170
5 4089.663 4213.389

8. Excel workbooks
Summary workbook: C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/stergm_result_tables_ten_year.xlsx
Transition workbook: C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/stergm_transition_tables_ten_year.xlsx

9. Output folders
Data:          C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/data
Models:        C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/models
Summaries:     C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/summaries
Coefficients:  C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/coefficients
Diagnostics:   C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/diagnostics
GOF:           C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/gof
Compare:       C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/compare
Descriptive:   C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/descriptive
Transitions:   C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/transition_models
Period Coefs:  C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/period_coefficients
Logs:          C:/Users/ACER/Desktop/无人机专利数据/stergm_output_ten_year_core_with_transition_models/logs
